In this paper, on the basis of the results obtained from the bench and field tests of the three roller bit, its improving direction is approached.
本文以三牙轮钻头的台架试验和油气田现场试验的效果为依据，探讨三牙轮钻头的改进方向。
This paper introduces a new fuzzy PID controller which can be used in the automotive engine test bench, the advantage of this PID cont roller lies in the online self-tuning function of PID parameter.
本文提出了一种应用于汽车发动机测试台架的模糊pid控制器，这种PID控制器优点在于PID参数可在线自整定。
Bench test shows that the double row short roller bearing works flexibly and normally and meets the basic performance requirement.
台架试验表明，该双列偏心短圆柱轴承运转灵活正常，达到了设计基本性能要求。
The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.
采用深孔牙轮钻机、利用高台阶崩落法成功地处理了复合采空区，解决了复合采空区处理难的问题，使技术人员在熟练浅采、深采空区处理的情况下，又探索出复合采空区的处理方法。
The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.
采用深孔牙轮钻机、利用高台阶崩落法成功地处理了复合采空区，解决了复合采空区处理难的问题，使技术人员在熟练浅采、深采空区处理的情况下，又探索出复合采空区的处理方法。
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