... 自重活塞式压力计 dead weight piston gage 反压活塞式压力计 entrant cylinder column 杠杆式活塞压力计 lever-type piston gauge ...
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piston gauge with re-entrant cylinder column
... piston gauge with equilibrium liquid,带平衡液柱活塞式压力计 piston gauge with re-entrant cylinder column,反压活塞式压力计 piston prover,活塞校准器 ...
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