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发明名称
Line holder for masons
摘要
申请公布号
US2603875(A)
申请公布日期
1952.07.22
申请号
US19490100125
申请日期
1949.06.20
申请人
KROLL JOHN H
发明人
KROLL JOHN H.
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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