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Is mainly the axle axis and the bearing bush sliding friction surface wears, becomes rough, creates the bearing oil leak.
密炼机的主要是轴子轴与轴承衬的滑动摩擦表面磨损，变得粗糙，造成轴承漏油。
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A friction plate with a hole for connecting piece of axle is superposed on the armature.
一摩擦片，叠置于衔铁上，中央具连轴块孔；
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