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