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发明名称
Shrinkage compensating means
摘要
申请公布号
US2397730(A)
申请公布日期
1946.04.02
申请号
US19450606188
申请日期
1945.07.20
申请人
EHRENHAFT FRANZ F
发明人
EHRENHAFT FRANZ F.
分类号
G03B41/08
主分类号
G03B41/08
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