4494| 12
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請(qǐng)教下這個(gè)東西的名字和作用,。謝謝 |
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點(diǎn)評(píng)
除了錐孔的外球面軸承使用,,其它錐孔軸承應(yīng)該也可以使用的吧,?
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點(diǎn)評(píng)
正解
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