The apparatus and {HEAD ~ method} of {TAIL ~ the invention} employ a gas torch which has the feature of selective addition of metal powder to the gas flow, in a cyclical pattern of metal spraying and non spraying utilization of the same torch 
of
The apparatus and { HEAD ~ method } of { TAIL ~ the invention } employ a gas torch which has the feature of selective addition of metal powder to the gas flow , in a cyclical pattern of metal spraying and non spraying utilization of the same torch
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