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发明名称
Machine for thinning the lands of oil piston rings
摘要
申请公布号
US2704422(A)
申请公布日期
1955.03.22
申请号
US19520300808
申请日期
1952.07.25
申请人
THOMPSON PRODUCTS, INC.
发明人
NORTON SAMUEL H.
分类号
B24B9/00;B24B19/11
主分类号
B24B9/00
代理机构
代理人
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