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公开(公告)号：US3460189A
公开(公告)日：1969-08-12
申请号：US3460189D
申请日：1967-03-08
Applicant: KEYSTONE CONSOLIDATED IND INC
Inventor： WALD SAMUEL K , WHITTOM ROBERT M
CPC classification number: E05D15/165 , E05Y2201/688 , E05Y2900/106 , Y10T16/3813
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