膜式燃气表。
气压式高度表测量气压是参照海平面的，透过一连串的真空膜盒、齿轮和弹簧来移动刻度盘上的指针。
The mechanical pressure altimeter measures atmospheric pressure relative to sea level through a series of bellows, gears, and springs, which move Pointers on a dial.
介绍热塑性塑料超声波焊接原理、特点。重点探讨了膜式煤气表膜片组件装配过程中对超声铆接技术的应用。
Introduces the principle and features of the ultrasonic welding of the thermoplastic staking technology in the course of gas meter diaphragm assembling.
分析了膜式燃气表运行过程中有异常噪声的原因，提出了相应的解决方法。
The reason why the abnormal noise occurs during operation of diaphragm gas meter is analyzed, and the corresponding solution is put forward.
分析了膜式燃气表运行过程中有异常噪声的原因，提出了相应的解决方法。
The reason why the abnormal noise occurs during operation of diaphragm gas meter is analyzed, and the corresponding solution is put forward.
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