Liketane tsa 20A-1/20B-1 ka bobeli ke mofuta oa ketane ea roller, 'me li fapana haholo-holo ka litekanyo tse fapaneng hanyane. Har'a tsona, bophahamo ba lebitso la ketane ea 20A-1 ke 25.4 mm, bophara ba shaft ke 7.95 mm, bophara ba kahare ke 7.92 mm, 'me bophara ba kantle ke 15.88 mm; ha bophahamo ba lebitso la ketane ea 20B-1 e le 31.75 mm, 'me bophara ba shaft ke 10.16 mm, ka bophara ba kahare ba 9.40mm le bophara ba kantle ba 19.05mm. Ka hona, ha u khetha liketane tsena tse peli, u hloka ho khetha ho latela boemo ba sebele. Haeba matla a lokelang ho fetisoa a le manyane, lebelo le phahame, 'me sebaka se le sesesaane, u ka khetha ketane ea 20A-1; haeba matla a lokelang ho fetisoa a le maholo, lebelo le le tlase, 'me sebaka se lekane, u ka khetha ketane ea 20B-1.
Nako ea poso: Phato-24-2023