The cutting edges may be formed by torsioning, cutting, grinding, machining, laser micromachining, or grit blasting.
For example a work shop or grit blasting area where hot work is considered "normal operation" will not require Permit to work.
Carry out international grit blasting, bottom plate repairing and repainting work for aboveground oil tank no. 8 in Chevron Tsing Yi Terminal in 2006.
