Amavili okusila angaphakathi anikezela ngokucokisekileyo ukucola komphezulu wangaphakathi ukufumana imiphetho egqwesileyo yomphezulu enomlinganiselo ochanekileyo. Zenziwa ngobunjineli bokunciphisa ukunxitywa rhoqo kunye nokuphucula amazinga okususwa kwempahla. Ngokuchaseneyo nokusila komphezulu we-cylindrical, imiphezulu yangaphakathi ifuna ukuhambelana okuphezulu komsebenzi wevili okuthetha ukuba ukufakwa kwangaphambili komphezulu wevili kube kanye. Amavili okugaya angaphakathi afumana uluhlu lwezicelo ekusileni iigiya, iibheringi, iiringi zangaphakathi, iiringi zangaphandle, amandongomane okuqhuba njl njl. Amanye amashishini asebenzisa la mavili.

1. Abavelisi becandelo lobunjineli

2. Izixhobo zokusika

3. Izixhobo kwaye uyafa

4. Iibheringi

5. Abancedisi be-Auto