Match the following non-traditional machining processes with the corresponding material removal mechanisms:
Machining process | Manufacturing Processes | ||
P. | Chemical machining | 1. | Erosion |
Q. | Electro-chemical machining | 2. | Corrosive reaction |
R. | Electro-discharge machining | 3. | Ion displacement |
S. | Ultrasonic machining | 4. | Fusion and vaporization |