Improved gate valve,申请号GB19940019488-传众专利搜索

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发明名称	Improved gate valve
摘要
申请公布号	GB9419488(D0)	申请公布日期	1994.11.16
申请号	GB19940019488	申请日期	1994.09.28
申请人	ABB VETCO GRAY INC	发明人
分类号	E21B29/04;E21B34/02	主分类号	E21B29/04
代理机构		代理人
主权项
地址

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