3. Iioyile zokuthambisa ezahlukeneyo zinemixube yeekhemikhali ezahlukeneyo; ukuxuba iintlobo ze-oyile ezingahambelaniyo kusenokubangela ukusabela kweekhemikhali, okunokukhokelela ekudlekeni kukaloliwe.
4. Izilayidi zikaloliwe ezikhokelayo kufuneka zifakwe i-lubricated phambi kokuhlanganiswa komatshini kunye nokuhanjiswa, kwaye inkqubo yokuthambisa yangaphambili ifuna ukugqunywa ngokupheleleyo kwe-stroke yokuhamba.