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