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现在有许多成功的靠帮装置是用高强聚乙烯做的。理想的靠帮要求有很高的抗冲击和抗磨损的能力,有高冲击韧性和低摩擦系数,以达到坚固、耐磨而且还容易滑动的效用。超高分子量的聚乙烯衬以适当的底料的混合
There are many successful backup devices now made of high-strength polyethylene. The ideal cradle requires high impact and abrasion resistance, high impact toughness and low coefficient of friction for robust, wear-resistant and yet slippery applications. Ultra-high molecular weight polyethylene lined with a suitable primer mix