Method and apparatus for electrically welding pipe,申请号US19290401176-传众专利搜索

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发明名称	Method and apparatus for electrically welding pipe
摘要
申请公布号	US1934409(A)	申请公布日期	1933.11.07
申请号	US19290401176	申请日期	1929.10.21
申请人	A. O. SMITH CORPORATION	发明人	CRAWFORD WILLIAM E.;HEINEMAN WARREN F.
分类号	B23K11/04	主分类号	B23K11/04
代理机构		代理人
主权项
地址

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