Yog lawm, peb muaj lub rooj zaum kov teeb nrog polyethylene hlua 6 hli, lub rooj zaum kov teeb nrog polyethylene hlua 6 hli yog siv rau kev txhim kho ceev ntawm lub rooj vag hloov tau yooj yim, txoj hlua thim rov qab tau txais kev tiv thaiv hauv tsev.

txoj hlua ntawm lub rooj vag kov teeb nrog polyethylene hlua 6 hli tuaj yeem txuas mus txog 6m, txoj hlua txoj kab uas hla: 6 hli, neeg xyuas pib: 6 x 0.20 hli stainless hlau xaim, poly hlua ntawm lub rooj kov teeb nrog polyethylene hlua 6 hli yob rov qab txiav thaum lub rooj vag qhib. Nws yog qhov yooj yim heev los tswj lub laj kab hluav taws xob.