128) The type of the chip produced when cutting ductile material is

129) The cutting tool in a milling machine is mounted on

130) The chip space between the back of one tooth and face of the next tooth in a milling cutter is called

131) The operation of milling two sides of a work piece simultaneously is called

132) In order to avoid dulling of cutter, climb milling operation should never be used when milling parts made of