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Number of entries (Data is updated on a monthly basis): 83776
GB/T 11299.3-1989
卫星通信地球站无线电设备测量方法 第一部分:分系统和分系统组合通用的测量 第三节:中频范围内的测量
Methods of measurement for radio equipment used in satellite earth stations--Part 1:Measurements common to sub-systems and combinations of sub-systems--Section three:Measurements in the i.f.range
GB/T 18591-2001
Welding--Guidance on the measurement of preheating temperature,interpass temperature and preheat maintenance temperature
GB 18918-2002
Discharge standard of pollutants for municipal waste-water treatment plant
Number of entries (Data is updated on a monthly basis): 83776