Method of and apparatus for welding pipe joints,申请号US19280305664-传众专利搜索

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发明名称	Method of and apparatus for welding pipe joints
摘要
申请公布号	US1872114(A)	申请公布日期	1932.08.16
申请号	US19280305664	申请日期	1928.09.13
申请人	A. O. SMITH CORPORATION	发明人	BURNISH HOWARD J.
分类号	B23K9/028	主分类号	B23K9/028
代理机构		代理人
主权项
地址

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