A gap is defined between the counter tool 14 and the sonotrode 20 for {HEAD ~ passage} of {TAIL ~ the material web} 12 
of
A gap is defined between the counter tool 14 and the sonotrode 20 for { HEAD ~ passage } of { TAIL ~ the material web } 12
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH