Method of welding {HEAD ~ pipes} onto {TAIL ~ pressure conveying elements}, especially pipe plates, pressure containers and collectors 
onto
Method of welding { HEAD ~ pipes } onto { TAIL ~ pressure conveying elements } , especially pipe plates , pressure containers and collectors
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH