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发明名称
Bricklayer's line trig
摘要
申请公布号
US2492044(A)
申请公布日期
1949.12.20
申请号
US19470756513
申请日期
1947.06.23
申请人
HULQUIST EDWARD M
发明人
HULQUIST EDWARD M.
分类号
E04G21/18
主分类号
E04G21/18
代理机构
代理人
主权项
地址
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