另有各种装备可改变转轴速度及使钻头自动钻入工作件中。
Means are provided for varying the spindle speed and (on some machines) for automatically feeding the drill into the workpiece.
另有各种装备可改变转轴速度及使钻头自动钻入工作件中。
Means are provided for varying the spindle speed and (on some machines) for automatically feeding the drill into the workpiece.
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