What is the difference between slot, groove and hole in mechanical

Linear Size of a Hole and Slot hole slot Product Description This heavy-duty hole punch makes peg hook holes for retail merchandising as well as home and office organizing It's powerful enough to cut holeman slot canyon Why to use a net hole and slot, and how to specify a net hole and slot

kensington nano security slot™ A T-slot nut that is placed in the T-groove of a machine tool and used together with a bolt ·A screw hole passes through ·Materials: S45C