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发明名称
ROAD SURFACES.
摘要
申请公布号
IE11819(L)
申请公布日期
1931.08.10
申请号
IED11819
申请日期
1931.01.16
申请人
JAMES THOMAS MITCHELL JOHNSTON.
发明人
分类号
(IPC1-7):E01C/00
主分类号
(IPC1-7):E01C/00
代理机构
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