Mpanda wa PVC umapangidwa ndi makina awiri opangira ma screw extrusion. PVC extrusion ndi liwilo kupanga ndondomeko imene yaiwisi pulasitiki ndi kusungunuka ndi kupangidwa kukhala mosalekeza yaitali mbiri. Extrusion umabala mankhwala monga mbiri pulasitiki, mapaipi pulasitiki, PVC sitima njanji, PV ...
Werengani zambiri