Momwe mungasankhire hydrogenated C5 petroleum resin ndi madzi osinthidwa oyera rosin resin mumakampani azomatira.
A.
B. Utoto wosinthidwa wamadzi-woyera wa rosin umakhala ndi tack yabwino komanso yokhalitsa
C. Rosin utomoni ndi wokonda zachilengedwe
D.
