Common iwiri chingwe minganga waya makina utenga otentha choviikidwa kanasonkhezereka waya kapena PVC TACHIMATA waya chitsulo monga zopangira kuti khalidwe mawaya minga, amene ntchito chitetezo asilikali, khwalala, njanji, ulimi ndi madera ulimi ziweto monga chitetezo ndi kudzipatula mpanda.
Kuchiza pamwamba: Waya wamagetsi wamagetsi, waya woviikidwa ndi malata otentha, waya wokutidwa ndi pvc.