range work meaning in English

层砌石工
整层砌筑

In this study , we can simulate and optimize the uprising 、 rotating and ranging working situation of crane by kinematics and dynamics method . with the building of parameter experiment interface of simulating experiment platform , we can modify the parameter of hydraulic power system and realize experiment analyzing when actual working parameter of crane is changed
通过该研究能够对起重机的机械系统实现起升、回转、变幅工作的运动学和动力学仿真试验和优化设计，并通过仿真实验平台的参数化实验界面的建立，实现对液压动力系统参数修改和起重机实际工作参数变化条件下的试验分析。