{TAIL ~ The first fixed electrode} has a central angle of 180°, for example, and is split into a first fixed split electrode member having a central angle of 60° and a second fixed split electrode member having {HEAD ~ a central angle} of 120° 
{ TAIL ~ The first fixed electrode } has a central angle of 180 ° , for example , and is split into a first fixed split electrode member having a central angle of 60 ° and a second fixed split electrode member having { HEAD ~ a central angle } of 120 °
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD OTH OTH OTH