Thaum kuv tshawb nrhiav cov fittings kev lag luam thiab hloov kho, Kuv tau tuaj hla qee yam nthuav tiag: SAE thiab NPP xov. Xav txog lawv raws li qab-cov hnub qub tso rau hauv peb cov tshuab. Lawv yuav zoo li zoo ib yam li xub thawj siab ib muag, tab sis lawv yeej sib txawv heev hauv yuav ua li cas lawv tsim, yuav ua li cas
Tom tsev