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公开(公告)号：US3505351A
公开(公告)日：1970-04-07
申请号：US3505351D
申请日：1966-02-07
Applicant: GAF CORP
Inventor： RANDALL DAVID I , SCHMIDT-NICKELS WILHELM
IPC: C09B62/343 , C09B62/36 , C09B62/38 , C09B62/40
CPC classification number: C09B62/36 , C09B62/343 , Y10S8/918
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