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公开(公告)号：US3493340A
公开(公告)日：1970-02-03
申请号：US3493340D
申请日：1965-06-29
Applicant: SIMPLOT CO J R
Inventor： BOSEN WENDELL R , HUMBERGER ROGER B , SMITH JACK L , DAVIS CHARLES M
CPC classification number: C01B25/22 , Y10S210/915
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