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