Igiya ye-annular ene-teeh kumphezulu ongaphakathi we-rm yayo .Isixhobo sangaphakathi sihlala sidibana ngegiya zangaphandle .

Xa edibanisa iigiya ezimbini zangaphandle, ujikelezo lwenzeka kwicala elichaseneyo.

Kufuneka kuthathelwe ingqalelo inani lamazinyo kwigiya nganye xa kudityaniswa igiya enkulu (yangaphakathi) enesixhobo esincinci (sangaphandle), kuba iintlobo ezintathu zophazamiseko zinokwenzeka.

Ngokuqhelekileyo iigiya zangaphakathi a ziqhutywa zizixhobo ezincinci zangaphandle.

Ivumela uyilo oludibeneyo lomatshini.