an ultrasonic unit including a converter, {HEAD ~ a sonotrode} to act on {TAIL ~ a material web}, and a booster to connect the sonotrode to the converter 
to act on
an ultrasonic unit including a converter , { HEAD ~ a sonotrode } to act on { TAIL ~ a material web } , and a booster to connect the sonotrode to the converter
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH