The control electronics further contain {HEAD ~ means} for switching the electronic power switch off during {TAIL ~ at least parts} of at least individual pulses 
The control electronics further contain { HEAD ~ means } for switching the electronic power switch off during { TAIL ~ at least parts } of at least individual pulses
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH