Hook block assembly,申请号GB19570020452-传众专利搜索

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发明名称	Hook block assembly
摘要
申请公布号	GB822246(A)	申请公布日期	1959.10.21
申请号	GB19570020452	申请日期	1957.06.28
申请人	THE NATIONAL SUPPLY COMPANY;THE OIL WELL ENGINEERING COMPANY LIMITED	发明人
分类号	B66C1/34;E21B19/04	主分类号	B66C1/34
代理机构		代理人
主权项
地址

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