{HEAD ~ The first fixed electrode} has {TAIL ~ 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 a central angle of 120° 
has
{ HEAD ~ The first fixed electrode } has { TAIL ~ 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 a central angle of 120 °
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH