The precision of liquid column manometer was described. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.

叙述了液柱式压力计的精度，对U形管压力计和双管差压计的正确使用方法及误差修正做了简要分析。

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SY1 series downhole pressure gauge is made of spring tube.

SY1型系列井下压力计，是一种弹簧管式井下压力计。

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The main fuel tank must have all the following: a filler tube, a ventilation system, fuel pickup tube and filter, plus a gauge-sending unit.

油箱必须装备以下元件：加油管、油箱通风系统、吸入管、滤清器和油量传感装置。

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For this scene and a specific, the emergency room, they didn't have - like a child gauge chest(ph) tube, but they can't leave the child bleed in his chest till he dies so they use the adult-size chest tube.

NPR: Doctor Takes Camera 'Inside the Red Zone' of War