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发明名称
RAILROAD BED CRIBBER
摘要
申请公布号
US3543297(A)
申请公布日期
1970.11.24
申请号
USD3543297
申请日期
1968.09.09
申请人
GEORGE T. BLACKWELL JR.
发明人
GEORGE T. BLACKWELL JR.
分类号
E01B27/04;(IPC1-7):E01B27/00
主分类号
E01B27/04
代理机构
代理人
主权项
地址
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