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QC/T 1052-2017

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QC/T 1052-2017 英文版 1959 购买 有增值税发票,[PDF]天数 <=3 通信车 有效

   
标准详细信息 QC/T 1052-2017; QC/T1052-2017
中文名称: 通信车
英文名称: Communication van
行业: 汽车行业标准 (推荐)
字数估计: 14,166
发布日期: 2017-01-09
实施日期: 2017-07-01
起草单位: 中集车辆(山东)有限公司
标准依据: 工业和信息化部公告2017年第2号

QC/T 1052-2017
Communication van
通 信 车
1 范 围
本标准规定了通信车的术语和定义、要求、试验方法、检验规则、标志、使用说明书、随车文件、运
输及贮存。
本标准适用于采用定型汽车底盘改装的通信车和通信半挂车(以下统称通信车),其他类型的通
信车参照执行。
2 规范性引用文件
下列文件对于本标准的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本
标准。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本标准。
GB 1495 汽车加速行驶车外噪声限值及测量方法
GB 1589 道路车辆外廓尺寸、轴荷及质量限值
GB 4785 汽车及挂车外部照明和光信号装置安装规定
GB 7258 机动车运行安全技术条件
GB 8108 车用电子警报器
GB/T 9969 工业产品使用说明书总则
GB 11567.1 汽车和挂车侧面防护要求
GB 11567.2 汽车和挂车后下部防护要求
GB/T 12534 汽车道路试验方法通则
GB/T 12677 汽车技术状况行驶检查方法
GB 13954 警车、消防车、救护车、工程救险车标志灯具
GB/T 18411 道路车辆产品标牌
JB/T 5943 工程机械焊接件通用技术条件
JT 230 汽车导静电橡胶拖地带
QC/T 252 专用车定型试验规程
QC/T 449-2010 保温车、冷藏车技术条件及试验方法
QC/T 4 8 4 汽 车 油 漆 涂 层
QC/T 625 汽车用涂镀层和化学处理层
YD/T 1051-2010 通信局(站)电源系统总技术要求
3 术语和定义
F列术语和定义适用于本标准。
3.1
工作舱 working space
通信车上安装移动通信系统、传输系统等通信主设备、人员操控所需相对独立的工作空间。
4 要求
4.1 总 则
4.1.1 通信车应符合本标准要求,并按经规定程序批准的产品图样和技术文件制造。
4.1.2 自制件应经检验部门检验合格后方能装配;外购件、外协件应符合有关标准的规定,有制造
厂的产品质量合格证,并经通信车制造厂复査合格后方能装配。
4.2 工作条件
通信车在下列条件下应能正常工作:
a) 环境温度 - 40°C ~ 40°C;
b) 空气相对湿度不大于 95%(25 °C)
c) 海拔高度不大于 4 000 m;
d) 行驶道路等级不低于四级。
4.3 整 车
4.3.1 所有外露黑色金属件均应进行防腐蚀处理;电镀件应符合 QC/T 625 的规定;油漆涂层应符
合 QC/T 484 的规定。
4.3.2 焊接件应符合 JB/T 5943 的规定。
4.3.3 各紧固件应连接牢固可靠,行驶时不得自行松动。
4.3.4 备胎装置及其位置如有改动,应保证安装可靠,装卸方便、灵活。
4.3.5 车厢及工作舱内部应设置灭火装置,灭火装置应安装牢固、取放方便。
4.3.6 车厢与车架连接应牢固可靠,车厢纵向对称面对于车架纵向对称面的偏移量不大于5
4.3.7 工作梯应安装牢固。如工作梯可收、放,则应收、放灵活,行驶时不得自行滑出。
4.3.8 通信车应具有良好的减震性能;通信主设备应靠厢体摆放,采用减震装置与车厢连接。
4.3.9 所有的工具、配件等应安装牢固、取用方便。
4.3.10 工作舱内应安装温度、湿度、烟度、浸水及车辆防盗用的报警装置。
4.3.11 安装的警报器应符合 GB 8108 的规定,安装的警示标志灯具应符合GB 13954 的规定,警
报器和警示标志灯具应固定可靠。
4.3.12 工作舱内必须安装导静电装置,并与整车导静电橡胶拖地带连接,导静电橡胶拖地带应符
合 JT 230的规定。
4.4 安 全 要 求
4.4.1 通信车运行安全应符合 GB 7258的规定。
4.4.2 通信车外廓尺寸、轴荷及质量限值应符合 GB 1589 的规定。
mm。
4.4.3 通信车外部照明及光信号的安装要求应符合 GB 4785的规定。
4.4.4 通信车侧面防护装置应符合 GB 11567.1的规定,后下部防护装置应符合 GB 11567.2的
规定。
4.4.5 通信车粘贴的反光标识和尾部标志板应符合 GB 7258的规定。
4.5 环保要求
4.5.1 通信车加速行驶车外噪声应符合 GB 1495的规定。
4.5.2 通信车驾驶员耳旁噪声应符合 GB 7258的规定。
4.5.3 通信车 1 m 处工作噪声值应不大于 60 dB(A)。
4.6 车 厢
4.6.1 车厢外表面应平整、过渡圆滑,无明显磕、碰、划、伤等痕迹。
4.6.2 车厢工作舱内底板上表面应平整,且耐磨、防滑、防静电。
4.6.3 车厢内、外壁应具有防水、不透气、阻燃、耐腐蚀、不吸湿等性能,内壁应易清洗,使用常用的
清洗剂或清洗方法不应对其产生不良影响。
4.6.4 车厢应选用吸水性低、透气性小、导热系数小、抗腐蚀性好的隔热材料。
盘及穿线孔处不应有渗漏现象。
4.6.6 工作舱应与其他设备工作区分开。
4.6.7 车厢工作舱应具有良好的隔热及隔音性能,其总传热系数 K 应小于0.6 W/(m2 *K)。
4.6.8 车厢内应安装照明装置,工作舱内还应配置应急照明及换气装置。
4.6.9 车厢门开启后应能牢固地锁止在车厢上。车厢门应启、闭轻便、灵活.
4.7 电源系统
4.7.1 通信车电源系统的组成应满足通信车的用电需求。
4.7.2 通信车电源系统应稳定、可靠、安全地供电,电源系统的类型应符合 YD/T 1051-2010 中
6.1.4或 6.1.5 的规定。
220/380 V、标称频率 50 Hz。
4.7.4 通信车交流供电方式应符合 YD/T 1051-2010中 8.1的规定。
4.7.5 通信车的直流基础电源为向各种通信设备和二次变换电源设备提供直流电压的电源,电源
电压为 - 4 8 V。
4.7.6 通信车直流供电方式应符合 YD/T 1051-2010中 9.1的规定。
4.8 车辆平衡系统
通信车平衡系统由平衡支腿及平衡仪组成,平衡系统应满足如下要求:
a) 平衡支腿的单腿承载 0.5 倍车辆总质量时,支撑高度的变动量应不大于 5 mm;
b) 平衡系统应具有可靠的锁止功能,模拟连续工作 200 h 以上,车身在各方向上的偏差应不
c) 平衡系统应能在四级公路 5%的坡度上调平。
4.9 天馈线系统
4.9.1 天线升、降机构。
通信车移动通信天馈线系统和微波传输天馈线系统配置的天线升、降机构应满足如下要求:
a) 天线升起高度应满足信号传输的要求;
b) 天线升、降系统应运行平稳;
c) 天线升、降系统应具有可靠的锁止功能,连续使用200 h 其自降量不超过 50 mm;
d) 天线升、降系统应具有良好的抗风性能,处于工作状态时,在空气流速为 13.8 m/s(六级
风)、无任何辅助稳定装置的条件下,信号满足使用要求;
4.9.2 天线安装。
通信车天线安装应满足如下要求:
a) 天线升、降系统上应设置移动通信天线支架,天线支架支持 3 个扇区的天线安装,并可手动
或电动调节天线水平方向角和俯仰角;
b) 天线升、降系统上应设置微波天线支架,天线支架可手动或电动调节天线水平方向角和俯
仰角
c) VAST 天线应安装在车厢顶部,不工作时其反射面朝向车厢顶部上平面。
4.9.3 馈线安装。
馈线应随天线升、降系统同步收放,可设置馈线随动线缆盘。
4.10.1 通信车控制系统应能实现天线升、降系统与防雨天窗及随动线缆盘之间的安全互锁。
4.10.2 配备柴油发电机组的通信车控斛系统应能实现市电突然断电时,自动启动柴油发电机组
供电。
4.10.3 控制系统应明确显示各系统的工作状态。
4.1 1 防雷接地系统
通信车应设置避雷装置,该装置应具有良好的接地、导电性能,该装置上任意两点间的电阻应不
大于 5 II。
4.1 2 调温系统
调温系统应保证车厢内温度为 18 °C 28 °C;车厢内温度达到设定值时,应保证车厢内温度变
5 试验方法
5.1 整车性能试验
5.1.1 整车基本性能试验按 QC/T 252的规定进行。
5.1.2 强制性检验项目应按国家有关规定进行。
5.2 淋雨试验、隔热性能试验
通信车的淋雨试验按 QC/T 449-2010 第 5.3.1 的规定进行,隔热性能试验按 QC/T 449-
2010 第 5.3.3 的规定进行。
5.3 工作噪声测量
5.3.1 通信车定置,车辆发动机熄火,通信系统和发电机组连续工作。
5.3.3 声级计置于“A”计权、“快”挡。
5.3.4 测点距地面 1.6 m,距车厢左面中间、右面中间、后面中间1 m 处,每一个测点测量 2次,2次
测量值之差不应超过3 dB,取 2次测量的平均值作为该测点的测试结果。
5.3.5 工作噪声为 3处测试结果的算术平均值。
5.4 电阻测量
电阻测量用万用表或其他仪器在避雷、接地装置及导静电装置上的任意两点间进行测量。
5.5 车厢内温度测量
将通信车置于外界环境中,通信车及空调正常工作 lh 后,在车厢内6个面的中心点距离内表面
0.1 m 处,用精度为:t 0.1 °C的温度计每隔 20 min 测量 1次,共测量 6次,然后取 6次测试结果的算
5.6 通信车平衡系统试验
5.6.1 通信车平衡支腿承载能力试验。
将平衡支腿按最大行程展开,放置在试验台上,用精度为:t 1
度。然后沿平衡支腿纵向均勻加载,至通信车总质量 50%并保持 30 min,再次用精度为土 1
卷尺测量平衡支腿展开高度。前后 2次的差值即为平衡支腿支撑高度的变动量。
5.6.2 通信车平衡系统锁止可靠性试验。
5.6.2.1 将通信车置于外界平坦、坚硬的场地中,通信车的平衡支腿全部打开,使通信车的轮胎全
部离开地面。将精度为 0.1°、量程不小于 8°的角度水平器置于通信车车厢地板中心位置处,调整各
支腿的高度,使角度水平器的气泡处于中心位置,然后将各支腿可靠锁止。
方向上的倾斜角度并做好记录。通信车处于模拟工作状态 200 h 后,再次分别测量车厢地板四角长
度方向、宽度方向上的倾斜角度。前后 2次的差值即为车身的角度偏差。
5.7 天线自降量测量
将通信车置于外界平坦、坚硬的场地中,通信车的平衡支腿全部打开,将天线升至最高点,用精
的卷尺测量天线的最高点到地面的距离。天线处于模拟工作状态 200 h 后,再次测量
的卷尺测量平衡支腿展开高mm
的mm
度为±1
天线的最高点到地面的距离。前后 2次的差值即为天线的自降量。
6.1 出厂检验
6.1.1 通信车须经制造厂质量检验部门进行检验,检验合格附有产品合格证后方可出厂。
6.1.2 出厂检验项目:
a) 外观质量;
b) 天线的升、降(或展开、收拢);
c) 平衡支腿的收、放;

QC/T 1052-2017
Communication van
Communication vehicle
1 Scope
This standard specifies the terms and definitions, requirements, test methods, inspection rules, signs, instruction manuals, on-board documents, transport
Loss and storage.
This standard applies to communication vehicles and communication semi-trailers (hereinafter collectively referred to as communication vehicles) modified by fixed-type vehicle chassis. Other types of communication vehicles
Letter car reference implementation.
2 Normative references
The following documents are essential for the application of this standard. For dated references, only the dated version applies to this
standard. For undated references, the latest version (including all amendments) is applicable to this standard.
GB 1495 Vehicle acceleration noise limit and measurement method
GB 1589 road vehicle outline dimensions, axle loads and mass limits
GB 4785 Installation Regulations for Exterior Lighting and Light Signaling Devices for Automobiles and Trailers
GB 7258 Motor vehicle safety technical requirements
GB 8108 vehicle electronic siren
GB/T 9969 General Instructions for Use of Industrial Products
GB 11567.1 side protection requirements for cars and trailers
GB 11567.2 requirements for rear protection of automobiles and trailers
GB/T 12534 General rules for automotive road test methods
GB/T 12677 Vehicle technical condition driving inspection method
GB 13954 signs for police cars, fire engines, ambulances, engineering rescue vehicles
GB/T 18411 road vehicle product label
JB/T 5943 General technical conditions for welding of construction machinery
JT 230 car static conductive rubber mop
QC/T 252 Special vehicle type test rules
QC/T 449-2010 Technical conditions and test methods for heat preservation and refrigerated vehicles
QC/T 4 8 4 Automotive paint coating
QC/T 625 Automotive coating and chemical treatment layer
YD/T 1051-2010 General technical requirements for power system of communication bureau (station)
3 terms and definitions
Column F terms and definitions apply to this standard.
3.1
Working space
The communication vehicle is equipped with a mobile communication system, a transmission system and other communication main equipment, and a relatively independent working space required for personnel control.
4 Requirements
4.1 General
4.1.1 The communication vehicle shall meet the requirements of this standard and be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures.
4.1.2 Self-made parts shall be assembled only after passing inspection by the inspection department; purchased parts and outsourced parts shall comply with the relevant standards and be manufactured
The product quality certificate of the factory can be assembled only after passing the inspection by the communication vehicle manufacturer.
4.2 Working conditions
The communication vehicle should work normally under the following conditions.
a) Ambient temperature-40 ° C ~ 40 ° C;
b) Air relative humidity is not more than 95% (25 ° C)
c) the altitude is not greater than 4 000 m;
d) The level of driving road is not lower than level 4.
4.3 Vehicle
4.3.1 All exposed ferrous metal parts shall be subjected to anti-corrosion treatment; electroplated parts shall comply with the requirements of QC/T 625; paint coating shall conform to
In accordance with QC/T 484.
4.3.2 Weldments shall comply with the provisions of JB/T 5943.
4.3.3 Fasteners shall be connected firmly and reliably, and shall not loosen by themselves when driving.
4.3.4 If the spare tire device and its position are changed, it shall ensure reliable installation, convenient and flexible loading and unloading.
4.3.5 Fire extinguishing devices shall be provided inside the compartment and the working compartment. The fire extinguishing devices shall be installed firmly and easily accessible.
4.3.6 The connection between the carriage and the frame should be firm and reliable, and the offset of the longitudinal symmetry plane of the carriage to the longitudinal symmetry plane of the carriage should not be greater than 5
4.3.7 The working ladder shall be installed firmly. If the working ladder can be retracted and retracted, it should be retracted and retracted flexibly.
4.3.8 The communication vehicle shall have good shock absorption performance; the main communication equipment shall be placed on the car body and connected with the car body by means of a shock absorption device.
4.3.9 All tools, accessories, etc. should be firmly installed and easily accessible.
4.3.10 Alarm devices for temperature, humidity, smoke, water intrusion and anti-theft of vehicles shall be installed in the working cabin.
4.3.11 The installed alarm shall comply with the provisions of GB 8108, and the installed warning sign lamps shall comply with the provisions of GB 13954.
Annunciators and warning signs should be fixed and reliable.
4.3.12 A static conductive device must be installed in the working cabin and connected to the static conductive rubber mop on the vehicle.
In accordance with JT 230.
4.4 Safety requirements
4.4.1 The safety of communication vehicles shall comply with the provisions of GB 7258.
4.4.2 The dimensions, axle loads and mass limits of communication vehicles shall comply with the provisions of GB 1589.
mm.
4.4.3 The installation requirements for external lighting and light signals of communication vehicles shall comply with the provisions of GB 4785.
4.4.4 The side guards of communication vehicles shall comply with the provisions of GB 11567.1, and the rear lower guards shall comply with GB 11567.2.
Regulations.
4.4.5 The reflective markings and tail marking boards affixed to communication vehicles shall comply with the provisions of GB 7258.
4.5.1 The noise outside the vehicle during the acceleration of the communication vehicle shall meet the requirements of GB 1495.
4.5.2 The noise near the driver's ear of the communication vehicle shall meet the requirements of GB 7258.
4.5.3 The working noise value at 1 m of the communication vehicle shall not be greater than 60 dB (A).
4.6 compartment
4.6.1 The outer surface of the carriage shall be smooth, with a smooth transition, without obvious marks such as bumps, bumps, scratches, and injuries.
4.6.2 The upper surface of the inner floor of the working compartment of the carriage shall be flat, wear-resistant, non-slip, and anti-static.
4.6.3 The inner and outer walls of the carriage shall have water-proof, air-proof, flame-retardant, corrosion-resistant and non-hygroscopic properties. The inner walls shall be easy to clean.
It should not be adversely affected by cleaning agents or cleaning methods.
4.6.4 The cabin should be selected with low water absorption, low air permeability, low thermal conductivity and good corrosion resistance.
There should be no leakage at the plate and threading holes.
4.6.6 The working space shall be separated from other equipment working areas.
4.6.7 The working compartment of the carriage shall have good thermal insulation and sound insulation performance, and its total heat transfer coefficient K shall be less than 0.6 W/(m2 * K).
4.6.8 Lighting equipment shall be installed in the compartment, and emergency lighting and ventilation equipment shall be provided in the working cabin.
4.6.9 After the compartment door is opened, it shall be able to be securely locked to the compartment. The compartment door should be open, closed and light and flexible.
4.7 Power System
4.7.1 The composition of the communication vehicle power system shall meet the electricity demand of the communication vehicle.
4.7.2 The communication vehicle power system shall supply power stably, reliably and safely. The type of power system shall comply with YD/T 1051-2010.
6.1.4 or 6.1.5.
220/380 V, 50 Hz nominal frequency.
4.7.4 The communication power supply method of communication vehicles shall comply with 8.1 of YD/T 1051-2010.
4.7.5 The DC basic power supply of communication vehicles is a power supply that supplies DC voltage to various communication equipment and secondary conversion power supply equipment.
The voltage is-4 8 V.
4.7.6 The DC power supply mode of communication vehicles shall comply with the provisions of 9.1 of YD/T 1051-2010.
4.8 Vehicle balance system
The communication vehicle balance system consists of balance legs and balance instruments. The balance system should meet the following requirements.
a) When the single leg of the balanced outrigger carries 0.5 times the total mass of the vehicle, the variation of the support height should not be greater than 5 mm;
b) The balance system should have a reliable locking function, which simulates continuous work for more than.200 hours. The deviation of the body in all directions should not be different.
c) The balance system should be able to level on a grade 5% slope.
4.9 Antenna feeder system
4.9.1 Antenna raising and lowering mechanism.
The antenna raising and lowering mechanisms of the communication vehicle mobile communication antenna feeder system and microwave transmission antenna feeder system configuration should meet the following requirements.
a) The height of the antenna should meet the requirements for signal transmission;
b) The antenna raising and lowering systems should run smoothly;
c) The antenna lifting and lowering system shall have a reliable locking function, and its self-falling amount shall not exceed 50 mm after.200 hours of continuous use;
d) The antenna lifting and lowering system should have good wind resistance. When it is in working condition, the air velocity is 13.8 m/s (Six
Wind), without any auxiliary stabilization device, the signal meets the requirements for use;
4.9.2 Antenna installation.
The installation of communication vehicle antenna should meet the following requirements.
a) Mobile communication antenna brackets should be installed on the antenna raising and lowering systems. The antenna bracket supports antenna installation in 3 sectors and can be manually operated.
Or adjust the horizontal and pitch angle of the antenna electrically;
b) Microwave antenna brackets should be installed on the antenna raising and lowering systems. The antenna bracket can be used to adjust the horizontal angle and tilt of the antenna manually or electrically
Elevation angle
c) The VAST antenna should be installed on the top of the carriage, and its reflective surface should face the upper plane of the top of the carriage when not in operation.
4.9.3 Feeder installation.
The feeder should be retracted synchronously with the antenna raising and lowering systems. A feeder cable tray can be set.
4.10.1 The control system of the communication vehicle shall be able to realize the safety interlocking between the antenna raising and lowering system and the rainproof sunroof and the follower cable tray.
4.10.2 The communication vehicle control system equipped with a diesel generator set shall be able to automatically start the diesel generator set when the mains power is suddenly cut off.
powered by.
4.10.3 The control system shall clearly show the working status of each system.
4.1 1 Lightning protection grounding system
The communication vehicle should be equipped with a lightning protection device. The device should have good grounding and conductive properties. The resistance between any two points on the device should not be
Greater than 5 II.
4.1 2 Temperature control system
The temperature regulation system should ensure that the temperature in the compartment is 18 ° C 28 ° C; when the temperature in the compartment reaches the set value, the temperature in the compartment should be guaranteed to change
5 Test method
5.1 Vehicle performance test
5.1.1 The basic performance test of the whole vehicle shall be carried out in accordance with QC/T 252.
5.1.2 Compulsory inspection items shall be carried out in accordance with relevant national regulations.
5.2 Rain test, heat insulation performance test
The rain test of the communication vehicle is carried out in accordance with QC/T 449-2010 Section 5.3.1, and the insulation performance test is carried out in accordance with QC/T 449-
2010 Regulation 5.3.3.
5.3 Working noise measurement
5.3.1 The communication vehicle is set up, the vehicle engine is turned off, and the communication system and the generator set work continuously.
5.3.3 The sound level meter is placed in the "A" weighting and "fast" gear.
5.3.4 The measurement point is 1.6 m from the ground, 1 m away from the center of the left side, the center of the right side, and the center of the back. Each measurement point is measured twice and twice.
The difference between the measured values should not exceed 3 dB, and the average value of 2 measurements is taken as the test result of the measurement point.
5.3.5 The working noise is the arithmetic mean of the three test results.
5.4 Resistance measurement
Use a multimeter or other instrument to measure the resistance between any two points on the lightning protection, grounding device, and static conductive device.
5.5 Temperature measurement in the cabin
Place the communication vehicle in the external environment. After the communication vehicle and air conditioner work normally for lh, the center point of the 6 faces in the compartment is away from the inner surface.
At 0.1 m, use a thermometer with an accuracy of t 0.1 ° C to measure once every 20 minutes for a total of 6 times, and then calculate the results of the 6 tests.
5.6 Communication vehicle balance system test
5.6.1 Carrying capacity test of communication vehicle outriggers.
Extend the balance leg according to the maximum stroke and place it on the test bench with the accuracy of t 1
degree. Then load uniformly along the longitudinal balance legs to 50% of the total mass of the communication vehicle and keep it for 30 minutes.
A tape measure measures the height of the outrigger balance. The difference between the forward and backward times is the amount of change in the support height of the balance leg.
5.6.2 Locking reliability test of communication vehicle balancing system.
5.6.2.1 Place the communication vehicle in a flat, hard field outside, all the balance legs of the communication vehicle are opened, and the tires of the communication vehicle
Department off the ground. Place an angle leveler with an accuracy of 0.1 ° and a range of not less than 8 ° at the center of the floor of the communication car.
The height of the legs makes the bubble of the angle leveler in the center position, and then each leg is reliably locked.
The angle of inclination in the direction and record it. After the communication vehicle is in the simulated working state for.200 h, the four corners of the floor of the compartment are measured again.
Inclination angles in the degree and width directions. The difference between the forward and backward times is the angular deviation of the vehicle body.
5.7 Antenna Self-Descent Measurement
Place the communication vehicle in a flat, hard field outside, all the balance legs of the communication vehicle are opened, raise the antenna to the highest point, and
The measuring tape measures the distance from the highest point of the antenna to the ground. After the antenna is in analog working state for.200 h, measure again
Measuring tape to measure the height
Mm
Degree is ± 1
The distance from the highest point of the antenna to the ground. The difference between the two times before and after is the amount of self-drop of the antenna.
6.1 Factory inspection
6.1.1 The communication vehicle must be inspected by the quality inspection department of the manufacturer. The inspection can be carried out only after the inspection certificate is attached with the product certificate.
6.1.2 Factory inspection items.
a) appearance quality;
b) raising or lowering the antenna (or expanding or retracting);
c) balance out and out of the outriggers;
相关标准:  QC/T 1100-2019  QC/T 1101-2019
   
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