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发明名称
BALLAST EXCAVATING AND CLEANING APPARATUS
摘要
申请公布号
CA359132(A)
申请公布日期
1936.07.14
申请号
CAD359132
申请日期
申请人
THE FAIRMONT RAILWAY MOTORS
发明人
HARRY W. PROTZELLER
分类号
主分类号
代理机构
代理人
主权项
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