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