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公开(公告)号:US3550664A
公开(公告)日:1970-12-29
申请号:US3550664D
申请日:1968-01-15
Applicant: DONALD D LEE
Inventor: LEE DONALD D
CPC classification number: B60C17/04 , B60C17/041
公开(公告)号:US3550664A
公开(公告)日:1970-12-29
申请号:US3550664D
申请日:1968-01-15
Applicant: DONALD D LEE
Inventor: LEE DONALD D
CPC classification number: B60C17/04 , B60C17/041