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怎樣說服工人自信的尺寸也必須檢驗(yàn)? |
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點(diǎn)評(píng)
要在設(shè)計(jì)壽命內(nèi)穩(wěn)定運(yùn)行,,靠機(jī)加工的多幾絲少幾絲影響沒那么巨大。材料,、熱處理,、裝配、潤(rùn)滑條件,、使用工況起決定作用
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