Nws tau txais kev siv tshuab vuam ntau zaus, lub teb chaws patent thev naus laus zis nrog cov khoom siv hluav taws xob ntau zaus raws li cov khoom siv hluav taws xob los ua kom sov cov hlau sawb, cov yeeb nkab steel tib lub sijhawm, yo ua nws welded ua ke tag nrho.Cov thev naus laus zis no muaj cov yam ntxwv zoo li cov thermal efficiency, loj tshav kub dissipation cheeb tsam, ntev kev pab cuam lub neej, ntau adaptation kub, siab siab, thiab lwm yam.