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发明名称
Ice-surfacing mechanism
摘要
申请公布号
US2174250(A)
申请公布日期
1939.09.26
申请号
US19370135822
申请日期
1937.04.08
申请人
STRAND ALFRED O;TUPPER CHARLES E
发明人
STRAND ALFRED O.;TUPPER CHARLES E.
分类号
E01H4/02
主分类号
E01H4/02
代理机构
代理人
主权项
地址
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