{TAIL ~ The material web} is guided through {HEAD ~ a gap} between the sonotrode and the counter tool and acted upon by the sonotrode 
{ TAIL ~ The material web } is guided through { HEAD ~ a gap } between the sonotrode and the counter tool and acted upon by the sonotrode
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH