Duba nassi da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar nassi: Passage: Kamar "daidaitaccen" injin radial, an gina rotaries gabaɗaya tare da adadin silinda (yawanci 5, 7 ko 9), don a iya kiyaye daidaitattun kowane-sauran-piston mai ƙonewa, don samar da aiki mai sauƙi. Injin Rotary tare da adadin silinda galibi na nau'in "jerin biyu" ne. Tambaya: Silinda nawa ne injin Rotary ke da shi?
5, 7 ko 9)