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经营范围
发明名称
Alloys
摘要
申请公布号
US2146630(A)
申请公布日期
1939.02.07
申请号
US19380212135
申请日期
1938.06.06
申请人
JOHN JOHNSON
发明人
JOHNSON JOHN
分类号
B23K35/30
主分类号
B23K35/30
代理机构
代理人
主权项
地址
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