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发明名称
Variable length portable ramp
摘要
申请公布号
US3009183(A)
申请公布日期
1961.11.21
申请号
US19560568286
申请日期
1956.02.28
申请人
LAY CARLTON E
发明人
LAY CARLTON E.
分类号
B65G69/28
主分类号
B65G69/28
代理机构
代理人
主权项
地址
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