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发明名称
Automatic electric welding apparatus
摘要
申请公布号
US2303720(A)
申请公布日期
1942.12.01
申请号
US19410412090
申请日期
1941.09.24
申请人
BERKELEY LAURENCE J
发明人
BERKELEY LAURENCE 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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