{HEAD ~ Approximately 300 ms} are needed for welding {TAIL ~ this seam}, during which the clamping device is moved to the next spot weld site 
are needed for welding
{ HEAD ~ Approximately 300 ms } are needed for welding { TAIL ~ this seam } , during which the clamping device is moved to the next spot weld site
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH