3424| 8
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螺栓連接的若干困惑問題,,進(jìn)來看看 |
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點(diǎn)評(píng)
粗牙螺紋強(qiáng)度高,,這個(gè)說法是很不對(duì)的,。同樣大徑情況下,細(xì)牙的承載能力要高的,。
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