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