Back sealing arrangement for gate valve stems,申请号US19660589293-传众专利搜索

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发明名称	Back sealing arrangement for gate valve stems
摘要
申请公布号	US3412750(A)	申请公布日期	1968.11.26
申请号	US19660589293	申请日期	1966.10.25
申请人	ALEXANDER S. VOLPIN	发明人	VOLPIN ALEXANDER S.
分类号	F16K3/02;F16K41/14	主分类号	F16K3/02
代理机构		代理人
主权项
地址

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