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经营范围
发明名称
Railway car trap door and folding step construction
摘要
申请公布号
US2124872(A)
申请公布日期
1938.07.26
申请号
US19360103746
申请日期
1936.10.02
申请人
THE O. M. EDWARDS COMPANY, INC.
发明人
CHAFFEE EDWARD F.
分类号
B61D23/02
主分类号
B61D23/02
代理机构
代理人
主权项
地址
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