a first lever section including a cylindrical body using {HEAD ~ the rotation axis} as its rotation center, and {TAIL ~ a first lever} having a turning radius projected from the cylindrical body 
a first lever section including a cylindrical body using { HEAD ~ the rotation axis } as its rotation center , and { TAIL ~ a first lever } having a turning radius projected from the cylindrical body
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH