Cov yam ntxwv ntawm kev sib npaug
Lub xeev kev sib luag muaj cov yam ntxwv nram qab no
(1) Ib Leeg (P thiab T yog sib npaug nyob txhua qhov chaw);
(2) Muaj kev ruaj khov ntawm lub xeev ntawm teeb meem-ywj pheej ntawm lub sijhawm;
(3) Qhov kawg ntawm cov txheej txheem tshwm sim;
(4) Thermal dynamic tshuav.