Nws yog tsim rau cov ntawv yas, cov yeeb yaj kiab, tsom iav, kov lub vijtsam thiab lwm yam khoom siv pob zeb thiab cov ntsuas ntsuas kub.Peb lub qhov kub npau taws tsis xav tau sov siab thaum xeem uas txuag cov neeg siv khoom lub sijhawm.Cov ntsiab lus conforms rau ISO, ASTM, JIS, DIN thiab lwm yam qauv thoob ntiaj teb kom tau raws li cov neeg siv khoom.