1. Hubi in miishaarka silsiladda korontadu ay gabaabsi tahay saliid, taasoo ka dhigaysa silsiladda engegan oo ku dheggan, taasoo keenaysa inay si caadi ah u wareegto.

2. Hubi in korantada matoorku ay meesha taal oo ay ku xidhan tahay.

3. Hubi in ay dhibaato ka jirto burushka kaarboonka ee matoorka.Xidhiidhka xun ee burushka kaarboonka ayaa sidoo kale sababi doonta in miinshaarka silsiladda korontadu ay ku guuldareysato inay si caadi ah u wareegto.

4. Hubi in ay jiraan arrimo shisheeye oo ku dheggan matoorka.