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GB/T 16732-2023 Units of measurement and symbols for building heating, ventilation, air conditioning and purification equipment 建筑供暖通风空调净化设备 计量单位及符号 - 英文版 |
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GB/T 22319.9-2018 Measurement of quartz crystal unit parameters—Part 9:Measurement of spurious resonances of piezoelectric crystal units 石英晶体元件参数的测量 第9部分:石英晶体元件寄生谐振的测量 - 英文版 |
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GB/T 22319.7-2015 Measurement of quartz crystal unit parameters—Part 7: Measurement of activity dips of quartz crystal units 石英晶体元件参数的测量 第7部分:石英晶体元件活性跳变的测量 - 英文版 |
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GB/T 22319.8-2008 Measurement of quartz crystal unit parameters - Part 8: Test fixture for surface mounted quartz crystal units 石英晶体元件参数的测量 第8部分:表面贴装石英晶体元件用测量夹具 - 英文版 |
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GB/T 21229-2007 Acoustics - Determination of sound power levels of noise from air-terminal devices,air-terminal units,dampers and valves by measurement in a reverberation room 声学 风道末端装置、末端单元、风道闸门和阀噪声声功率级的混响室测定 - 英文版 |
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