Waya wa TW/THW ndi wofewa, wolimba kapena wosasunthika, wopangidwa ndi mkuwa wotetezedwa ndi Polyvinylchloride (PVC).
Waya wa TW umayimira waya wopangidwa ndi thermoplastic, wosalowa madzi.
Waya wa THW ndi waya wa thermoplastic, wosagwira madzi, koma wosagwira kutentha, wotchulidwa ndi H m'dzina lake.


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