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公开(公告)号：US3522699A
公开(公告)日：1970-08-04
申请号：US3522699D
申请日：1968-12-02
Applicant: LESLIE POPRADI
Inventor： POPRADI LESLIE
CPC classification number: F16C1/26 , D07B2201/2064 , F16C1/20 , Y10T74/20456 , D07B2801/24
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