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1998-07-16
自掃作動式自動定圧リフト弁装置
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1959-04-02
Check valve for oil pipe lines
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2019-02-01
一种设有防堵装置的排污阀
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1951-06-19
Balanced slow-closing valve assembly
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1929-06-11
Pressure-regulating valve
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Adjustable automatic shutoff valve
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1983-03-14
逆止弁
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1952-01-08
Apparatus for automatic periodic cleaning of straining members
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1999-03-31
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Improvements in or relating to check and foot valves
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1900-07-31
Automatic valve-closing mechanism.
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1991-06-30
Газовый редуктор
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1957-04-09
Ball cock valve assembly for flush mechanisms
GB507972A
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1939-06-23
Improvements in or relating to feed apparatus for pressure storage water heaters
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Improvements in Valves.
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1952-03-25
Hydraulic pressure control apparatus
SU175014A1
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Гидравлический классификатор
DE69177C
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Absperrventil mit Nothschlufsklappe
DE140485C
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DE196632C
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1915-07-02
Improved Method and Appliance for the Retail Pouring Out of Fermentable Liquids kept under Pressure.
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2022-09-20
一种可快速拆换内件的零泄漏全通径控制阀
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2015-12-16
一种带缓启机构的旋启式止回阀
GB189924305A
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1900-01-06
Improvements in Steam Actuated Dash-pot Mechanism for Use in connection with Engine Valve-gear.