{TAIL ~ A vacuum switch} with {HEAD ~ a driving device} for switching a vacuum tight switching tube into on and off positions 
{ TAIL ~ A vacuum switch } with { HEAD ~ a driving device } for switching a vacuum tight switching tube into on and off positions
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH