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1.发明授权Device for measuring differential pressure of liquid or gaseous fluids,particularly very small pressure differences,as well as applications of this device 失效用于测量液体或气体流体的差压的装置，特别是非常小的压力差异，以及本设备的应用
公开(公告)号：US3503264A
公开(公告)日：1970-03-31
申请号：US3503264D
申请日：1967-08-25
Applicant: COMPTEURS COMP D
Inventor： GASSIES EDMOND AUGUSTE
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