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经营范围
发明名称
Apparatus for aligning, welding, and testing pipe joints
摘要
申请公布号
US2167886(A)
申请公布日期
1939.08.01
申请号
US19370153864
申请日期
1937.07.15
申请人
NATIONAL TUBE COMPANY
发明人
GRAHAM JAMES B.;MAYER RAOUL G.
分类号
B23K37/053
主分类号
B23K37/053
代理机构
代理人
主权项
地址
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