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公开(公告)号：US3389943A
公开(公告)日：1968-06-25
申请号：US59023866
申请日：1966-10-28
Applicant: LEITNER EQUIPMENT COMPANY
Inventor： JONES HAROLD B , ZMUDA THEODORE E
IPC: E06B3/46
CPC classification number: E06B3/4663
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