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公开(公告)号：US2643224A
公开(公告)日：1953-06-23
申请号：US6770048
申请日：1948-12-28
Applicant: PIERO NICCOLI
Inventor： PIERO NICCOLI
CPC classification number: C01B13/11 , A61L2/202 , C01B2201/14 , C01B2201/20 , C01B2201/74 , C01B2201/76
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