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经营范围
发明名称
ALUMINOTHERMIC WELDING PROCESS
摘要
申请公布号
US3421570(A)
申请公布日期
1969.01.14
申请号
USD3421570
申请日期
1967.02.20
申请人
ELEKTRO THERMIT GMBH.
发明人
HANS GUNTERMANN
分类号
B23K35/34;C23C18/02;C23C20/00;(IPC1-7):B22D23/00
主分类号
B23K35/34
代理机构
代理人
主权项
地址
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