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