背景：以三维力学分析标枪非投掷臂最后用力阶段的相关参数，是数字化运动医学研究的热点。
BACKGROUND: the mechanical parameters of non-throwing arm at the stage of final exertion for the javelin, is a hot topic of digital sports medicine.
它是利用数字化的信息对机床运动及加工过程进行控制的一种方法。
It is the use of digital information on the machine tool movement and control of processing methods.
此实验装置以PC加运动控制卡作为上位控制单元，具有数字化、集成化、开放式的特点。
This system uses PC and motion control cards as the upper control unit. It is digitized, integrated and open.
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