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Improvements in electrically operated clocks

申请公布号:GB352582(A)

申请号:GB19300012588

申请日期:1930.04.23

申请公布日期:1931.07.16

申请人:
THOMAS MERCER;FRANK MERCER

分类号:G04C13/04

主分类号:G04C13/04

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