Cov hnab khoob khoob, feem ntau hu ua cov hnab hauv qab, yog tam sim no thoob ntiaj teb nrov ntim cov hnab ntim khoom. Lawv pub mov los ntawm sab saud lossis hauv qab lub pob valve thiab siv cov khoom ntim tshwj xeeb. Tom qab sau cov khoom, lawv tau ntim rau hauv thawv. Lawv zoo huv si thiab zoo nkauj thiab yog cov ib puag ncig kev tiv thaiv cov hnab.
Cov hnab tshos valve muaj cov yam ntxwv ntawm kev txhim kho kev ntim khoom, kev thauj mus los yooj yim, kev ruaj khov thiab qis tus nqi tawg.
Cov khoob khoob khawm tuaj yeem muab faib ua qhov qhib nruab nrab sab saud, qhib cov twb qhib qis thiab sab saud thiab hauv nruab nrab raws li qhov qhib.
Cov hnab tshos roj hmab tuaj yeem muab faib ua: PP lub hnab ntim hluav taws xob, PE lub hnab nyiaj siv hluav taws xob, ntawv-yas ntawv sib txuas ntawm cov khoob, kraft ntawv valve qhov quav thiab ntau txheej kraft ntawv valve hnab.
Cov hnab tshos cov khoom siv yog siv rau ntim cov hmoov ntim lossis cov khoom lag luam zoo xws li cov zaub mov hmoov, tshuaj lom neeg, tshuaj chiv, cov khoom siv hluavtaws, khoom tawg, nplej, ntsev, cov zaub mov thiab lwm yam khoom yooj yim. Nws yog qhov tshwj xeeb tshaj yog tsim nyog rau kev lag luam xa tawm thiab tuaj yeem txhim kho qib ntim ntawm cov khoom.
Yog tias koj muaj qee qhov xav tau ntawm pp valve sacks, pls. xav tiv tauj kuv rau kev nug thiab cov qauv dawb.
