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发明名称
PARALLEL RULE AND PROTRACTOR
摘要
申请公布号
CA421069(A)
申请公布日期
1944.06.27
申请号
CAD421069
申请日期
申请人
JOHN DONALD MACLEAN
发明人
JOHN DONALD MACLEAN
分类号
主分类号
代理机构
代理人
主权项
地址
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