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Means for unblocking lenses
申请公布号:
US2421753(A)
申请号:
US19420431404
申请日期:
1942.02.18
申请公布日期:
1947.06.10
申请人:
AMERICAN OPTICAL COMPANY
发明人:
JOYCE WILLIAM J.
分类号:
B24B13/005
主分类号:
B24B13/005
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