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公开(公告)号:US2972387A
公开(公告)日:1961-02-21
申请号:US78396658
申请日:1958-12-30
Applicant: ALLIS CHALMERS MFG CO
Inventor: SEVERSON WILMER M
IPC: A01C7/20
CPC classification number: A01C7/201 , Y10T29/49895 , Y10T403/32377
公开(公告)号:US2972387A
公开(公告)日:1961-02-21
申请号:US78396658
申请日:1958-12-30
Applicant: ALLIS CHALMERS MFG CO
Inventor: SEVERSON WILMER M
IPC: A01C7/20
CPC classification number: A01C7/201 , Y10T29/49895 , Y10T403/32377