Vacuum process of welding,申请号US19310554361-传众专利搜索

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发明名称	Vacuum process of welding
摘要
申请公布号	US1956818(A)	申请公布日期	1934.05.01
申请号	US19310554361	申请日期	1931.07.31
申请人	RAY ACRE	发明人	ACRE RAY
分类号	B23K20/04	主分类号	B23K20/04
代理机构		代理人
主权项
地址

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