樓主: 黃連苦
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鋼與鋼的過(guò)盈配合,它們之間的壓力---請(qǐng)教 |
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點(diǎn)評(píng)
有熱裝設(shè)備時(shí)熱裝更簡(jiǎn)單
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點(diǎn)評(píng)
他這是45鋼,硬度夠的
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點(diǎn)評(píng)
面積對(duì)摩擦系數(shù)也有點(diǎn)影響
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