3222| 12
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軸承座透蓋悶蓋等該不該發(fā)黑處理 |
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點(diǎn)評(píng)
順便說(shuō)一下,大廠可以采用磷化處理,作為中間處理效果好,能保存較長(zhǎng)時(shí)間,油漆附著好。
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