Cov khoom no yog cov khoom siv kub kub tshwj xeeb uas siv rau kev ntaus lub Hoobkas lub npe, kev lag luam kos npe, hom, specification, xyoo, ntev moldings ntawm cov cables nto, nws kuj siv rau luam ntawv ntawm ntau qib ntawm polyethylene yeeb nkab thiab lwm yam yas siv nyob rau hauv lub Pipe Marking kev lag luam. Cov khoom lag luam tshwj xeeb uas muaj xim zoo nkauj muaj rau luam tawm ntawm PVC yeeb nkab.
Cov khoom no siv cov tshuaj tshwj xeeb thiab cov khoom siv tes ua haujlwm siab heev. Txhua qhov kev qhia tau mus txog thiab tshaj tawm txawv teb chaws zoo li cov khoom lag luam.