以下为句子列表：
英文: Powder-metallurgy copper two-metals friction material has a steel body and wear-resistant copper-alloy thin coating.Its frictional factor is lower,It has good wearing resistance,csolidl self-lubrication and anti-bite.
中文: 铜基粉末冶金双金属减摩材料是以钢为基体，薄层铜合金为耐磨层，它具有较低的摩擦系数，耐磨性好，具有固体自润滑成份，有良好的抗咬合性。
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