Imveliso ephambili ye-ф 48-3620mm ubukhulu bodonga 6mm-40mm eyomeleziweyo yenqanaba le-3PE umbhobho wensimbi ongenamthungo, umbhobho we-oyile kunye negesi, iprojekthi yokuhambisa i-oyile kunye negesi egqunywe umbhobho weplastiki, umbhobho wokhuseleko lomlilo weplastiki, ukhuseleko lomlilo ngaphakathi nangaphandle umbhobho wentsimbi ogqunywe ngaphakathi, Idiphu eshushu yeplastiki yamandla okuthunga umbhobho wentsimbi, umbhobho wokukhusela intambo.