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经营范围
发明名称
PIPE-GRIPPING APPARATUS
摘要
申请公布号
US3579753(A)
申请公布日期
1971.05.25
申请号
USD3579753
申请日期
1970.03.09
申请人
YOUNGSTOWN SHEET AND TUBE CO.
发明人
DALE H. PRYOR
分类号
E21B19/07;(IPC1-7):F16L7/00
主分类号
E21B19/07
代理机构
代理人
主权项
地址
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