The wire compression roller 32 is positioned so that it lies on {TAIL ~ the side} of the welding wire 1 opposite the wire driving roller 30 and so that the exterior radial surface of the wire compression roller 32 is in {HEAD ~ contact} with the welding wire 1 
The wire compression roller 32 is positioned so that it lies on { TAIL ~ the side } of the welding wire 1 opposite the wire driving roller 30 and so that the exterior radial surface of the wire compression roller 32 is in { HEAD ~ contact } with the welding wire 1
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