Improvements in or relating to portable oil well derricks,申请号GB19540024650-传众专利搜索

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发明名称	Improvements in or relating to portable oil well derricks
摘要
申请公布号	GB760186(A)	申请公布日期	1956.10.31
申请号	GB19540024650	申请日期	1954.08.24
申请人	LEE C. MOORE CORPORATION	发明人
分类号	E04H12/18;E21B15/00	主分类号	E04H12/18
代理机构		代理人
主权项
地址

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