Roj phom phom yog ib qho cuab yeej siv los roj cov cuab yeej siv tshuab. Nws tuaj yeem xaiv tau nrog lub thoob hlau (hlau taub hau) lossis hose (lub taub hau tiaj tus) refueling nozzle. Rau refueling txoj hauj lwm yooj yim nyob rau hauv ib tug dav qhov chaw yuav siv tau hlau pas nrig (hlau taub hau), rau refueling txoj hauj lwm muab zais, roundabout qhov chaw yuav tsum tau siv hose (cav taub hau) rau refueling. Cov khoom no muaj qhov zoo ntawm kev ua haujlwm yooj yim, nqa tau yooj yim, siv ntau yam, yog feem ntau ntawm cov tshuab ua liaj ua teb, cov chaw tu vaj tse tsim nyog.
