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1.Dry powder fire-extinguishing medium discharge and directing apparatus 失效
Title translation: 干粉灭火介质排放和导向装置公开(公告)号:US2562930A
公开(公告)日:1951-08-07
申请号:US9937349
申请日:1949-06-09
Applicant: SPECIALTIES DEV CORP
Inventor: DONIEL MAPES
CPC classification number: A62C31/00 , B05B1/265 , B05B7/1486