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发明名称
Grave digger
摘要
申请公布号
US2770057(A)
申请公布日期
1956.11.13
申请号
US19530371444
申请日期
1953.07.31
申请人
CAMP JOHN L
发明人
CAMP JOHN L.
分类号
E02F3/40;E02F3/413
主分类号
E02F3/40
代理机构
代理人
主权项
地址
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