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发明名称
摘要
申请公布号
FR2221235(B1)
申请公布日期
1977.09.23
申请号
FR19740008117
申请日期
1974.03.11
申请人
NORTON CY
发明人
分类号
B24D3/00;B24D3/28;B24D7/02;(IPC1-7):B24D5/16
主分类号
B24D3/00
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代理人
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