Rolling
Sliding
Dragging
Use a trolly
Cooling the metal
Heating the metal slowly
Hold at a given temperature
Heat and cool the metal as soon as possible
To increase softness
To with stand wear resistance
To withstand heavy load
To decrease the brittleness
Oxygen valve in cylinder
Oxygen valve at blow pipe
Acetylene valve in cylinder
Acetylene valve at blow pipe
Gas cutting
Plasma cutting
Manual cutting
Machine cutting