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经营范围
发明名称
Continuous digging apparatus
摘要
申请公布号
US3307276(A)
申请公布日期
1967.03.07
申请号
US19640349213
申请日期
1964.03.04
申请人
LANDMARK ENGINEERING, INC.
发明人
RUSSELL JAMES C.
分类号
E02F3/08;E02F3/14;E02F5/02;E02F5/06
主分类号
E02F3/08
代理机构
代理人
主权项
地址
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