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发明名称
Grinding mechanism
摘要
申请公布号
US1839253(A)
申请公布日期
1932.01.05
申请号
US19280258176
申请日期
1928.03.01
申请人
OLOFSON CHARLES J
发明人
OLOFSON CHARLES J.
分类号
B24B41/00
主分类号
B24B41/00
代理机构
代理人
主权项
地址
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