Rulman rul bo'g'imi milining ildiziga o'rnatiladi, uni olib tashlash qiyin, chunki uni ishlatish noqulay. Maxsus tortgichdan foydalanish mumkin, uni osongina olib tashlash mumkin. Tortgichning ikkita yarim konussimon ichki dumaloq tortma yenglarini ichki podshipnikga qo'ying, mahkamlang...
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