Thata: lebopo A 67A – lebopo A 90A

Sekhomaretsi se phethiloeng se na le khanyetso e ntle ea solvent le ho hanyetsa ho roala, elasticity e ntle le deformation e nyane ea compression.

E sebelisetsoa ho etsa libethe tsa khatiso, li-scrapers le libethe tse ling tse sa senyeheng ka thata, mabili a rabara le lihlahisoa tse ling.