本文根据四大干线的技术条件，论证了提速客货列车的牵引质量，运行速度，行车密度间的合理匹配。
Based on the technical conditions of the four major trunk lines, this article demonstrates the rational match between hauled weight, operating speed and traffic density.
工作空间大、运行速度快、重复定位精度高，适用于对焊缝质量有较高要求的焊接应用。
Large work space, fast running speed, high repeat positioning accuracy, applied to the weld quality demanding welding applications.
P 51 XA是一种与MCS - 51兼容的16位单片机，运行速度快，存储器空间大，支持实时多任务操作系统。
P51XA is a MCS-51 compatible 16-bit MCU which runs fast, has a large memory capacity and supports RTOS.
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