Yas nruas yog ib lub thawv uas siv los tuav cov dej khib nyiab pov tseg.Cov khoom siv yog high-density polyethylene yas.Thaum cov kua khib nyiab tsis sib haum nrog cov yas zoo li no, stainless hlau lossis lwm yam khoom siv kuj muaj.Hauv cov chaw kuaj tshuaj lom neeg lossis tshuaj lom neeg, feem ntau koj tuaj yeem pom cov thoob yas loj nrog cov ntawv cim qhov muag ntawm cov ces kaum lossis hauv cov chaw cim.
Wellguarding yog cov chaw tsim khoom thiab cov chaw muag khoom ntawm cov nruas yas.Peb tuaj yeem xa cov nruas yas zoo tshaj plaws nyob txhua qhov chaw hauv ntiaj teb los ntawm peb cov neeg siv khoom zoo thiab cov kev pabcuam zoo.Wellguarding yog tus tsim ntawm txhua yam yas nruas nyob ntawm seb koj xav tau.Xa koj lub nruas yas zoo tagnrho rau peb thiab peb zoo siab xa tag nrho koj cov nruas yas xav tau.