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.
膜盒，内含低压空气的密封弹性装置。当它周围的压力变化时，会膨胀或收缩。
ANEROID, a sealed flexible device containing air at low pressure, which expands or contracts during change of pressure outside the device.
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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