Improved means for holding casing and other pipes in well-drilling,申请号GB19290010277-传众专利搜索

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发明名称	Improved means for holding casing and other pipes in well-drilling
摘要
申请公布号	GB311698(A)	申请公布日期	1930.04.03
申请号	GB19290010277	申请日期	1929.04.02
申请人	EMSCO DERRICK & EQUIPMENT COMPANY	发明人
分类号	E21B19/10	主分类号	E21B19/10
代理机构		代理人
主权项
地址

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