(1) Tus nqi txias forging tuag tsis siab, uas tuaj yeem tswj tau tus nqi zoo;
(2) Muaj peev xwm ntau lawm, haum rau ntau lawm;
(3) Lub voj voog tsim pwm yog luv luv, feem ntau 10 mus rau 15 hnub;
(4) Ib qho -lub sij hawm molding, qhov ua tau zoo ntawm cov cua kub dissipation yog ua raws li cov khoom siv hluav taws xob, thiab cov txheej txheem ua tom qab yog tsawg thiab yooj yim.
