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PAMA公司开发新型Speedcenter机床的宗旨是为了使机床更坚固耐用,精度更高,加工成果更显著。加工中心托盘尺寸从1250×1250m m、20......
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Influence of Polyalkylmethacrylate VIIs on Boundary Film Formation,Friction,Wear and Efficiency of L
Polyalkylmethacrylates (PAMAs) are well-known as viscosity index improvers and dispersant boosters. This paper shows tha......
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介绍的专用自动通话计费系统采用二级计算机控制方式,不依赖任何交换设备,能对64路电话用户进行数据采集及复式计费,具有独特的个人计费......