检查控制盘内外部各操作和自动元件有无异常，各操作用防护开关是否关闭或者在停止位置。
Examine the control panel, operating instrument and auto components, all the protection switches are on OFF position or STOP position.
介绍高浓盘磨机液压系统的主要性能参数，液压系统原理图的拟定，液压油及液压元件的选型计算。
The main parameters of hydraulic system of HC refiner, the draft of the diagram of hydraulic system, the selection calculation of hydraulic oil and the elements are presented in the paper.
螺纹块和捏合盘是同向双螺杆挤出机的主要混合功能元件。
The screw block and kneading disc are two main functional mixing elements of the co-rotating twin-screw extruder(CRTSE).
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