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這是什么表面處理工藝,? |
點(diǎn)評(píng)
樓主,你真的是我看過的最NB的哦,!說話不打草稿�,。�,!HRC你在哪里看過有幾百的,。平常見到個(gè)HRC60以上的東東就很不錯(cuò)的了。
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