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1.发明授权
公开(公告)号：US2833673A
公开(公告)日：1958-05-06
申请号：US41875754
申请日：1954-03-25
Applicant: UNION CARBIDE CORP
Inventor： HART THOMAS F , WISHART JR RONALD S
IPC: C04B41/49
CPC classification number: C04B41/4961 , Y10T428/31652 , Y10T428/31663
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