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公开(公告)号：US3017157A
公开(公告)日：1962-01-16
申请号：US809260
申请日：1960-02-11
Applicant: SPECIALTIES DEV CORP
Inventor： PARSONS FLOYD B , THEN JOSEPH L
IPC: F16K31/56
CPC classification number: F16K31/56
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