Zithunzi za SPC
Pansi pa SPC ndi njira yokhazikika komanso yowoneka bwino ya pansi yomwe ili yabwino kwa malo okhalamo komanso ogulitsa. Amapangidwa makamaka ndi PVC (polyvinyl chloride) ndi miyala yamchere yachilengedwe. kuzipangitsa kuti zisalowe madzi, zisakandane, komanso zosavuta kuzisamalira. Pachimake chapamwamba kwambiri chimapereka kukhazikika ndi mphamvu zowoneka bwino, pamene chovala chovala chimapereka chitetezo chapamwamba pa kuvala kwa tsiku ndi tsiku.
