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公开(公告)号：US3338669A
公开(公告)日：1967-08-29
申请号：US46712865
申请日：1965-06-25
Applicant: DEGUSSA
Inventor： GERHARD DUSING , GUNTHER BRETSCHNEIDER , HARRY KLOEPFER , FRITZ SPERR , HEINRICH SCHMIDT
IPC: C01B21/08
CPC classification number: C01B21/08
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