樓主: tntk
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昨晚修自行車(chē)碗組,順便畫(huà)了一個(gè)結(jié)構(gòu)示意圖給大家看看 |
點(diǎn)評(píng)
保持架很多軸承上都有,保持架減少了球的數(shù)量,壽命就一定會(huì)減少嗎?
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