The elevation of the shafting system at low-lying step mode acting as an appraisal function, the optimal design of the shafting system was given.
以提高低阶固有频率作为动态优化目标函数，对主轴系统进行了优化设计。
Characteristics lying in our current warehousing enterprises are small scale, single-mode management style and nonstandard running, which is unmatched with the low profit level.
我国目前的仓储企业都是小规模的，管理模式单一，运营不规范与其赢利水平低呈现不相称性。
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