ANNULAR SEAL WITH V-CUT,申请号GB19840028913-传众专利搜索

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发明名称	ANNULAR SEAL WITH V-CUT
摘要
申请公布号	GB8428913(D0)	申请公布日期	1984.12.27
申请号	GB19840028913	申请日期	1984.11.15
申请人	SMITH INTERNATIONAL INC	发明人
分类号	E21B33/12;E21B33/00;E21B33/04;E21B34/02;F16J15/18;F16J15/32	主分类号	E21B33/12
代理机构		代理人
主权项
地址

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