膜盒是一种密封的弹簧绉纹管，可以感受大气压力的变化。
An aneroid is a sealed bellows which is sensitive to changes in atmospheric pressures.
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.
膜盒是一种密封的弹簧绉纹管，可以感受到大气压力的变化。
An aneroid is a sealed bellows which is sensitive to changes in atmospheric pressure.
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