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有什么簡(jiǎn)單分辨常用金屬的方法,? |
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點(diǎn)評(píng)
一般什么材質(zhì)
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點(diǎn)評(píng)
用SUS304 3/4H試下,,硬度要求310以上,。不指定的話供應(yīng)商有啥用啥給你用軟料自然沒彈性,。
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