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21.发明授权
公开(公告)号：US3193530A
公开(公告)日：1965-07-06
申请号：US5764660
申请日：1960-09-22
Applicant: ALLIED CHEM
Inventor： OXENRIDER BRYCE C
IPC: C08G64/24
CPC classification number: C08G64/24
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