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发明名称
Rolling device
摘要
申请公布号
US2481021(A)
申请公布日期
1949.09.06
申请号
US19460661170
申请日期
1946.04.10
申请人
KEMPTHORNE JAMES L
发明人
KEMPTHORNE JAMES L.
分类号
E04F21/08
主分类号
E04F21/08
代理机构
代理人
主权项
地址
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