The speed-ratio curve of double-action parallel indexing cam mechanism has special property in shape, which makes it is not available from present transmission function, but designed purposely.
双作用式平行分度凸轮机构对速比曲线的几何形态有特殊要求，这使得该机构的速比不能从同类机构现有运动规律中得到，而必须经过特殊设计。
In high speed transmission system such as SDH, parallel scrambling technique is required.
在高速传输系统如sdh中，需要用到并行扰码技术。
High speed data acquisition and transmission, and simple control are the advantages of the condition monitoring system based on PC parallel port.
基于计算机通用并行口的设备状态监测与故障诊断系统具有采集与数据传输速度快，控制方便等优点。
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