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发明名称
Platform cover roughening and grading machine
摘要
申请公布号
US2491962(A)
申请公布日期
1949.12.20
申请号
US19470756571
申请日期
1947.06.23
申请人
ENDICOTT JOHNSON CORPORATION
发明人
EXLEY LEO F.
分类号
C14B1/48
主分类号
C14B1/48
代理机构
代理人
主权项
地址
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