Isku dhufashada
Xargaha xargaha ayaa inta badan laga sameeyay alaab tayo sare leh oo kala duwan, oo lagu doortay iyadoo lagu saleynayo dalabaadka gaarka ah ee codsiyada kala duwan ee ku saabsan xoogga, adkeysiga, iyo iska caabinta daxalka. Birta kaarboonku waxay u taagan tahay mid ka mid ah walxaha ugu baahsan, gaar ahaan darajooyinka sida 4.8, 8.8, iyo 10.9.