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发明名称
Portable earth leveling apparatus
摘要
申请公布号
US2593880(A)
申请公布日期
1952.04.22
申请号
US19470773117
申请日期
1947.09.10
申请人
HEAVILIN ORAL R
发明人
HEAVILIN ORAL R.
分类号
A01B31/00;E02F3/76
主分类号
A01B31/00
代理机构
代理人
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地址
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