Raws li pom hauv daim duab, UPVC qhov sib npaug qhov ntim ntim tau tshwm. Cov khoom tau ntim rau hauv lub hnab yas pob tshab nrog lub cim IFAN PLUS ntawm daim kab xev ntim, thiab tom qab ntawv ntim rau hauv lub thawv daj. Lub thawv ntawv muaj IFAN PLUS lub logo thiab cov cim cim ntawm cov khoom lag luam xws li cov lej khoom, npe khoom, qauv khoom, khoom ntau, khoom xim, thiab lwm yam.
