1. Ubukhulu obahlukeneyo: Ngokwemilo, umgibe wamanzi unokwahlulwa ube yi-P kunye nohlobo lwe-S.Ngokwezinto eziphathekayo, inokwahlulwa ibe yintsimbi engenasici, iPVC kunye ne-PE ifakela imibhobho.Ngokomlinganiselo wombhobho womgibe wamanzi, unokwahlulwa ube yi-40, 50, DN50 (ipayipi ye-intshi eyi-2, i-75, i-90 ...
Funda ngokugqithisileyo