● Khoom siv: Yas + Hlau
● Yooj yim thiab yooj yim rau kev khiav lag luam: tsim los rau kev tshem tawm thiab teeb tsa cov cuab yeej siv yooj yim, yooj yim dua thiab ceev.
● Kev siv ntau yam: siv tau rau txhua tus qauv valve, tsheb thauj khoom, maus taus, tsheb kauj vab, tsheb, tsheb fais fab, maus taus thiab lwm yam.
● Tiv thaiv kom tsis txhob muaj lub log tsheb tsis txaus vim lub valve tawm, yog li ua rau muaj kev nyab xeeb
● Cov cuab yeej tuaj yeem nruab thiab tshem tawm cov tub ntxhais valve
● Muaj ntau hom xim kov muaj rau kev kho

Qauv: FTT10, FTT11, FTT11-3, FTT13