Complete the manual part program for drilling a hole located at point $$(20, 20)$$ from the target point . The depth of the hole to be drilled is $$15mm$$
$$\eqalign{ & \,\,\,\,\,\,FROM/TARG \cr & \,\,\,\,\,\,GOTO/20,\,\,20,\,\,0 \cr} $$

The final finishing process for the surface plate made of cast iron which is used as a reference surface is

In the manufacture of twist drills, the shank is joined to the body of the drill using

The cutting tool material normally used for turning steel of very high hardness is