The two-position operating mechanism brings convenience for unloading observation and reasonable control of unloading speed.
双位置操作机构，方便观察卸料情况，合理控制卸料速度。
There summarize the operating principle of absolute, incremental and hybrid encoder, introduce the choice principle of optical-encoder model and the measuring method of rotor speed and rotor position.
对绝对式、增量式和混合式光电轴编码器的工作原理进行了综述，介绍了光电轴编码器的选型原则、转子速度的测量和转子位置的测量方法。
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