DOWN-HOLE BLOW-OUT PREVENTERS,申请号GB19850014887-传众专利搜索

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发明名称	DOWN-HOLE BLOW-OUT PREVENTERS
摘要
申请公布号	GB8514887(D0)	申请公布日期	1985.07.17
申请号	GB19850014887	申请日期	1985.06.12
申请人	SMEDVIG AKSJESELSKAP PEDER	发明人
分类号	E21B33/06;E21B21/10;E21B33/127;E21B34/00;E21B34/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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