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公开(公告)号：US3423119A
公开(公告)日：1969-01-21
申请号：US3423119D
申请日：1966-06-06
Applicant: ZIMMERMAN D W MFG
Inventor： STANLEY ROBERT W
CPC classification number: B66C1/0243 , B65G47/91 , B66C1/0212
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