Cov khoom tseem ceeb ntawm couplings rau cov kav dej thiab fittings yog stainless hlau, vim lub caij ntuj no haze, nyob rau hauv tsoom fwv ntau lawm txwv, raw khoom nqi nce, yog li yog hais tias muaj ib co couplings txiav txim, thov hu rau thiab xaj kom sai li sai tau.

Cov khoom tseem ceeb ntawm couplings rau cov kav dej thiab fittings yog stainless hlau, vim lub caij ntuj no haze, nyob rau hauv tsoom fwv ntau lawm txwv, raw khoom nqi nce, yog li yog hais tias muaj ib co couplings txiav txim, thov hu rau thiab xaj kom sai li sai tau.—— Lub Kaum Ob Hlis 12, 2019