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圖紙中關(guān)于表面處理(磷化,陽(yáng)極氧化)的尺寸理解 |
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點(diǎn)評(píng)
防止金屬被腐蝕;用于涂漆前打底,提高漆膜層的附著力與防腐蝕能力;在金屬冷加工工藝中起減摩潤(rùn)滑作用。
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