凸轮机构控制巨型液压机分配阀芯时，在不同的升程阶段对凸轮理论工作曲线压力角有不同的要求。
During different lift range phases when a CAM controls the distribution spool of a giant hydraulic press, the CAM's requirement for the pressure Angle of its theoretical working profile is different.
但是，时程分析技术复杂、计算工作量大及占用计算机机时长，在地震工程中的应用受到一定的限制。
But the method is constrained in the application to the earthquake engineering because technology is complicate, amount of work is big, and calculation time is long.
研究采煤机在割煤落煤过程中，粉尘在综采工作面的沿程分布情况。
On-way distribution of dust in the full face mining was researched during the process of coal mining machine cutting coal.
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