Triaxial creep tests on coal rocks are carried out by Step Method and the XTR01 electric-fluid servo compression machine.
使用XTR01型微机控制电液伺服试验机，采用梯级加载法，对煤岩进行了三轴蠕变试验。
A motion controller interchangeable for servo motor and step motor constructed by motion control chip PCL240AS is introduced.
提出一种用运动控制芯片PCL240AS构造的伺服电动机和步进电动机通用的运动控制器。
In the past for a long time, step motor to take up a large market, but China is gradually replaced for servo motor.
在过去很长一段时间里，步进电机占很大的市场，但目前正逐步为伺服电机所取代。
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