The work principle of underwater cutter of plastic drainage plate, selection of electrical machinery and saw blade, as well as the spacing device of drainage plate, etc. are introduced.

介绍塑料排水板水下切割机的工作原理、电机选用、锯片选用；排水板的限位装置等。

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While it's hard to tell the physical features from the blurred shot, the wider spacing around the Windows Phone soft keys suggests this might be a larger device than the existing Lumia 920.

ENGADGET