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发明名称
Cultivator depth control device
摘要
申请公布号
US2640403(A)
申请公布日期
1953.06.02
申请号
US19500155960
申请日期
1950.04.14
申请人
HALVERSON BERTRAM A
发明人
HALVERSON BERTRAM A.
分类号
A01B33/02;A01B33/08;B62D51/00
主分类号
A01B33/02
代理机构
代理人
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地址
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