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发明名称
摘要
申请公布号
GB1227793(A)
申请公布日期
1971.04.07
申请号
GBD1227793
申请日期
1968.04.11
申请人
发明人
分类号
B23H5/08;B24D3/34
主分类号
B23H5/08
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代理人
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地址
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