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聚氨酯和尼龍的摩擦系數(shù)有多大? |
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點(diǎn)評(píng)
尼龍的學(xué)名是聚酰胺(簡(jiǎn)稱(chēng)PA),與聚氨酯(簡(jiǎn)稱(chēng)PU)是不同的。
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