In addition, an operating unit is provided with second shafts, and {HEAD ~ the rotating unit} is also connected to {TAIL ~ the second shafts} in a rotatable manner 
is connected to
In addition , an operating unit is provided with second shafts , and { HEAD ~ the rotating unit } is also connected to { TAIL ~ the second shafts } in a rotatable manner
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH