Plasma Cutting Torch
A plasma cutting torch is used in a process to cut steel and other metals or materials. This process uses a powerful electric arc to create plasma out of a blast of ordinary dried air to vaporize or literally "plasmatize" the material which is being cut.
The plasma cutting torch uses a two cycle approach to produce plasma. A high-voltage, low current circuit is used to initialize a very small high intensity spark within the torch body, thereby generating a small pocket of plasma gas. When cutting begins, the second circuit trips in and changes the current to a low-voltage, high current circuit, thereby initiating a high-speed powerful jet of plasma, which travels at over 15,000 km/h.
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Definition of Plasma Cutting Torch provided by Wikipedia.