For example, it is known that {HEAD ~ the mandrel} can be at {TAIL ~ an angle} with respect to the axis of the plasma beam, and this variation can be implemented in conjunction with the principles of present invention 
at
For example , it is known that { HEAD ~ the mandrel } can be at { TAIL ~ an angle } with respect to the axis of the plasma beam , and this variation can be implemented in conjunction with the principles of present invention
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH