The second support apparatus rotatably supports {HEAD ~ the electrode} of {TAIL ~ the welding device} in a relatively fixed relationship to the valve body and has an elongated tubular member extending through the hole in the first support apparatus 
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The second support apparatus rotatably supports { HEAD ~ the electrode } of { TAIL ~ the welding device } in a relatively fixed relationship to the valve body and has an elongated tubular member extending through the hole in the first support apparatus
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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