Internal sib tsoo log muab cov kev sib tsoo ntawm cov chaw sab hauv kom tau txais qhov zoo tshaj plaws nto tiav nrog qhov tseeb dimension. Lawv tau tsim kho ntxiv los txo qhov hnav khaub ncaws ntau zaus thiab txhim kho cov khoom tshem tawm. Nyob rau hauv sib piv rau cylindrical nto sib tsoo, sab hauv tej qhov chaw yuav tsum tau siab log-ua hauj lwm conformity implying hais tias lub pre-dressing ntawm lub log nto yog raws nraim. Internal sib tsoo log pom muaj ntau yam kev siv nyob rau hauv kev sib tsoo ntawm lub zog, bearings, puab rings, txheej rings, steering ceev thiab lwm yam. Qee qhov kev lag luam uas siv cov log no.

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