A conventional lathe and a $$CNC$$ lathe are under consideration for machining a given part. The relevant data are shown below :

The machine preferred for producing $$100$$ pieces is

Deep hole drilling of small diameter, say $$0.2$$ $$mm$$ is done with $$EDM$$ by selecting the tool material as

Abrasive material used in grinding wheel selected for grinding ferrous alloys is

The abrasive material used in grinding wheel selected for grinding of ferrous alloys is