10571| 12
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聚氨酯(Polyurethane (shore 90A))材料加工 |
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點(diǎn)評(píng)
軟的,要求刀具比較鋒利,相應(yīng)的切削三要素也高
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點(diǎn)評(píng)
指取得硬度的一種試驗(yàn)方式,不管他就是了
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