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发明名称
摘要
申请公布号
LU64398(A1)
申请公布日期
1972.06.19
申请号
LUD64398
申请日期
1971.12.02
申请人
发明人
分类号
B23K20/227;B23K33/00
主分类号
B23K20/227
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代理人
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地址
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