2778| 3
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鋁合金 2011 和2011-t6哪種更容易切削? |
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點(diǎn)評(píng)
剛才說(shuō)錯(cuò)了。鋁的比重是2.9。鐵7.85.不銹鋼7.93。銅8.8。呵呵帶來(lái)不便請(qǐng)諒解!!!!!!!
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