Piperazine Kev Tiv Thaiv Hluav Taws Xob

Cov khoom tsim kev puas tsuaj: carbon monoxide, carbon dioxide, nitrogen oxide.
Txoj kev tua hluav taws: Cov neeg tua hluav taws yuav tsum hnav lub npog ntsej muag roj thiab lub cev tag nrho lub cev tua hluav taws kom tua hluav taws nyob rau hauv qhov siab.
Tus neeg tua hluav taws tua hluav taws: dej pos huab, ua npuas ncauj, hmoov qhuav, carbon dioxide, xuab zeb