The invention discloses a polypropylene material with low density, high rigidity and scratch resistance and a preparation method thereof.
本发明公开了一种低密度、高刚性、耐刮擦的聚丙烯材料及其制备方法。
GPS survey and the method of high density resistance rate are two kinds of the advanced practical techniques in admin...
GPS测量及高密度电阻率法两种先进实用技术，是项目实施的先进手段。
GPS survey and the method of high density resistance rate are two kinds of the advanced practical techniques in admin...
GPS测量及高密度电阻率法两种先进实用技术，是项目实施的先进手段。
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