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精軋管、精拔管和精拉管,是一個(gè)意思嗎 |
點(diǎn)評(píng)
粗糙度的水平看你要求了,要求高,就貴一些,理論上都可以滿足你要求,
謝謝998大俠!這么說(shuō)他的粗糙度都能達(dá)到一樣的效果吧?
評(píng)分
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