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