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发明名称
Valve grinder
摘要
申请公布号
US1793308(A)
申请公布日期
1931.02.17
申请号
US19300421160
申请日期
1930.01.16
申请人
ECKELS PARL O
发明人
ECKELS PARL O.
分类号
B24B15/00
主分类号
B24B15/00
代理机构
代理人
主权项
地址
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