摇动工作台，或调节行程时要特别注意避免砂轮撞上磨头或尾座。
Take special attention to avoid the grinding wheel hitting grinding head or the tailstock , while operating the handle of the worktable or adjusting its stroke.
汽门座研磨砂轮主要用于引擎中汽车门座研磨。
Carbo valve seat Grinding Wheel is used mainly for valve seat grind in an engine.
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