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发明名称
A practical process to make roads or paths non-slippery
摘要
申请公布号
GB509864(A)
申请公布日期
1939.07.24
申请号
GB19380016477
申请日期
1938.06.02
申请人
WILLIAM PEARCE
发明人
分类号
E01C7/35
主分类号
E01C7/35
代理机构
代理人
主权项
地址
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