Cov kab lus qhia hauv qab no yog txhua yam hais txog cov cab cov yeeb nkab fittings , los ntawm cov ntaub ntawv ntsig, koj tuaj yeem tau txais cov ntaub ntawv cuam tshuam, koj tuaj yeem tau txais cov ntaub ntawv cuam tshuam, koj tuaj yeem tau txais cov ncauj lus tshwj xeeb txog cov pa roj hmab yeeb nkab fittings . Peb vam tias cov xov xwm no yuav muab txoj kev pab koj xav tau. Thiab yog tias cov cab cov yeeb nkab fittings tsis daws tsis tau koj cov kev xav tau, koj tuaj yeem tiv tauj peb rau cov ntaub ntawv cuam tshuam.