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发明名称
Trowel
摘要
申请公布号
US2178899(A)
申请公布日期
1939.11.07
申请号
US19390254415
申请日期
1939.02.03
申请人
SHAFFER GUY J
发明人
SHAFFER GUY J.
分类号
E04F21/16
主分类号
E04F21/16
代理机构
代理人
主权项
地址
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