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发明名称	VENTILSITZ
摘要
申请公布号	DE602005005669(T2)	申请公布日期	2008.07.17
申请号	DE200560005669T	申请日期	2005.04.29
申请人	SPECIALISED PETROLEUM SERVICES GROUP LTD.	发明人	TELFER, GEORGE;SCOTT, EDWARD DOCHERTY
分类号	E21B23/08;E21B34/00;E21B34/14	主分类号	E21B23/08
代理机构		代理人
主权项
地址

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