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发明名称
Improvements relating to calenders
摘要
申请公布号
GB672920(A)
申请公布日期
1952.05.28
申请号
GB19490013315
申请日期
1949.05.18
申请人
PAUL DORNBUSCH
发明人
分类号
D06C15/02;D21G1/00
主分类号
D06C15/02
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代理人
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