手机必须工作在旁路模式，也就是说，它必须直接连接到其他分机。
The phone must not be working in bypass mode, i. e. it must be connecting directly to the other extension.
控制特点是采用了比例旁路、通过小选器切换控制模式等控制方法。
The control characteristic of the Simadynd controller is that it adopts the controlling methods of proportional bypass and switching control mode via minimal selection.
通过进行设计优化，提出采用旁路放水系统放水方案，可有效解决工作面初采的放水问题，为倾斜长壁开采的综放工作面放水方式提出新模式。
Through optimizing, we suggested the measure of bypass draw off system which can solve draw off problem effectively. This suggested a new mode at inclined long wall mining.
通过进行设计优化，提出采用旁路放水系统放水方案，可有效解决工作面初采的放水问题，为倾斜长壁开采的综放工作面放水方式提出新模式。
Through optimizing, we suggested the measure of bypass draw off system which can solve draw off problem effectively. This suggested a new mode at inclined long wall mining.
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