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发明名称
Portable swivel-truck conveyer
摘要
申请公布号
US1763423(A)
申请公布日期
1930.06.10
申请号
US19280297171
申请日期
1928.08.03
申请人
DUNCAN FOUNDRY AND MACHINE WORKS, INC.
发明人
JR. GEORGE D. DUNCAN,
分类号
E21F13/02
主分类号
E21F13/02
代理机构
代理人
主权项
地址
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