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发明名称
Safety skid for mine cars
摘要
申请公布号
US2290505(A)
申请公布日期
1942.07.21
申请号
US19400360179
申请日期
1940.10.07
申请人
SUMMEROUR JOHN H
发明人
SUMMEROUR JOHN H.
分类号
B61K7/20
主分类号
B61K7/20
代理机构
代理人
主权项
地址
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