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发明名称
CONSTRUCTION OF THE SUBSURFACE OF AN ICE RINK
摘要
申请公布号
CA885735(A)
申请公布日期
1971.11.16
申请号
CAD885735
申请日期
1969.05.23
申请人
WILMEN R. SILLS
发明人
WILMEN R. SILLS
分类号
E01C13/10
主分类号
E01C13/10
代理机构
代理人
主权项
地址
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