electrical welding means for adding material to {TAIL ~ the valve body} having an electrode to provide {HEAD ~ an arc} and wire adding means to provide the material 
electrical welding means for adding material to { TAIL ~ the valve body } having an electrode to provide { HEAD ~ an arc } and wire adding means to provide the material
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH