SAW sensor device using a NO2 gas test.
利用SAW传感器器件进行了NO2气体测试。
Introduce the research gas test technology and its applications of hydrazine propellant both at home and abroad.
介绍了国内外肼类推进剂气体检测技术的研究水平和应用状况。
Combined with natural gas test work, the quality control method in natural gas chemical laboratory was discussed.
结合天然气检测工作实际情况，对天然气检测实验室质量控制方式进行了探讨。
Two commonly used methods of pressurization test of pipelines with free-surface in best common are close water test and close gas test.
闭水试验和闭气试验是无压管道进行严密性试验最常采用的两种试验方法。
Two commonly used methods of pressurization test of pipelines with free-surface in best common are close water test and close gas test.
闭水试验和闭气试验是无压管道进行严密性试验最常采用的两种试验方法。
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