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