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经营范围
发明名称
FREIGHT CAR RETARDING SYSTEM
摘要
申请公布号
US3517187(A)
申请公布日期
1970.06.23
申请号
USD3517187
申请日期
1968.01.29
申请人
PORTEC INC.
发明人
PRESTON O. ROBARDS
分类号
B61K7/12;(IPC1-7):B61L3/12
主分类号
B61K7/12
代理机构
代理人
主权项
地址
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