-
Cov lag luam 'cov lus teb rau kev sib kis
Peb cov kev xav tau nrog koj thiab koj tsev neeg thaum lub sijhawm tsis paub tseeb no. Peb muaj nuj nqis tiag tiag rau qhov tseem ceeb ntawm kev tuaj koom ua ke los tiv thaiv peb lub ntiaj teb cov zej zog thaum lub sijhawm xav tau. Peb xav ua txhua yam peb ua tau kom peb cov neeg siv khoom, cov neeg ua haujlwm thiab cov zej zog nyob nyab xeeb. Peb cov neeg ua haujlwm pabcuam tam sim no ua haujlwm ...Nyeem ntxiv -
Yuav ua li cas xaiv hom hluav taws kub zoo tshaj plaws
Thawj lub tshuab tua hluav taws tau patented los ntawm chemist Ambrose Godfrey nyob rau hauv 1723. Txij thaum ntawd los, ntau hom tshuaj tua hluav taws tau tsim, hloov kho thiab tsim. Tab sis ib yam tseem zoo ib yam tsis hais lub sijhawm twg - plaub lub ntsiab lus yuav tsum muaj rau hluav taws kom muaj nyob. Cov khoom no muaj xws li oxygen, cua sov ...Nyeem ntxiv -
Kev nyab xeeb npaum li cas yog kev tua hluav taws ua npuas ncauj?
Cov neeg tua hluav taws siv aqueous Film-forming ua npuas ncauj (AFFF) los pab tua hluav taws nyuaj, tshwj xeeb yog hluav taws uas muaj roj av lossis lwm yam kua hluav taws xob, hu ua Class B hluav taws. Txawm li cas los xij, tsis yog txhua lub foob pob hluav taws raug cais raws li AFFF. Qee cov AFFF formulations muaj cov chav kawm ntawm chemi ...Nyeem ntxiv
