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公开(公告)号：US3367676A
公开(公告)日：1968-02-06
申请号：US53452666
申请日：1966-03-15
Applicant: ROBERT D. PEARSON , ALBERT E. BOIE
Inventor： PEARSON ROBERT D , BOIE ALBERT E
IPC: B62B1/20
CPC classification number: B62B1/208
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