Cov khoom lag luam thiab nta: ib tus neeg faib khoom raug teeb tsa muaj "thawj" daim, "tus tw" rau 10 txog 10 daim ntawv ua haujlwm. Dosing lub voj voog dispenser nrog ib lub raj. Qhov loj me ntawm cov ntim tawm tuaj yeem hloov raws cov kev sib txuas thiab cov naj npawb ntawm cov sib txuas rau qhov kev tawm mus yuav nce lossis qis dawb huv. Qhov xwm txheej ntawm txhua qhov hluav taws xob yog tus sawv cev ntawm txhua qhov chaw, yog li txhua qhov teeb meem tuaj yeem txheeb tau sai.
