Slack pipe loop lowering device and method,申请号US19560595216-传众专利搜索

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发明名称	Slack pipe loop lowering device and method
摘要
申请公布号	US2859717(A)	申请公布日期	1958.11.11
申请号	US19560595216	申请日期	1956.07.02
申请人	AUBREY S. CRUTCHER	发明人	CUMMINGS JAMES D.
分类号	B66C23/20;F16L1/032	主分类号	B66C23/20
代理机构		代理人
主权项
地址

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