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公开(公告)号：US3015173A
公开(公告)日：1962-01-02
申请号：US5240860
申请日：1960-08-29
Applicant: CATERPILLAR TRACTOR CO
Inventor： KIMSEY WOODROW P , RYAN WILLIAM J
CPC classification number: A01B73/00 , E02F3/64 , E02F3/6454 , E02F3/652 , E02F3/657
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