1. Thaum peb yuav nws hauv lub khw, peb tuaj yeem pom tias nws cov xim tsis sib xws, seb qhov chaw yog du thiab xis nyob, seb nws cov seem yog honeycomb-puab, thiab seb puas muaj cov undulations hauv zos thiab qhov siab sib txawv. Yog hais tias peb khoov nws los ntawm txhais tes, nws tsis yog yooj yim los tshwm deformed thiab elastic; Lub suab nrov thaum tapping saum npoo nrog koj txhais tes qhia tau hais tias cov khoom ntawm VC yas hose no muaj zog thiab qhov zoo dua, thaum lub cev tsis zoo PVC yas hose yog nkig heev thiab txawm tawg nrog lub teeb tawg.
2, Qhov thib ob, peb tuaj yeem nyob ze rau qhov tsis hnov tsw, txawm tias nws muaj qee qhov tsis hnov tsw, yog tias koj tuaj yeem hnov tsw tsw ntxhiab tsw, nws txhais tau hais tias nws cov PVC yas hose muaj kev ua haujlwm tsis zoo, feem ntau yog ua los ntawm cov khoom tsis zoo, nws tsis pom zoo rau yuav. Txhawm rau kom ntseeg tau qhov kev tiv thaiv ib puag ncig thiab ua haujlwm ntev ntawm PVC yas hoses, nws raug nquahu kom koj mus rau hauv lub khw muag khoom loj hauv zos lossis cov khw muag khoom tshwj xeeb mus yuav.
