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发明名称	CHAIN LOCKER SEALS
摘要
申请公布号	GB8415382(D0)	申请公布日期	1984.07.18
申请号	GB19840015382	申请日期	1984.06.15
申请人	SOUTH EASTERN DRILLING SERVICES LTD	发明人
分类号	B63B21/18;(IPC1-7):B63B/	主分类号	B63B21/18
代理机构		代理人
主权项
地址

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