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公开(公告)号：US3531958A
公开(公告)日：1970-10-06
申请号：US3531958D
申请日：1968-11-14
Applicant: RAVEN IND INC
Inventor： KOCKX DALE J , STRAATMEYER GLEN E
IPC: E05B37/12
CPC classification number: E05B37/12 , Y10T70/7305 , Y10T70/7333 , Y10T70/7362
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