The maneuverability is achieved by a substantially disc shaped {TAIL ~ inner part} 3, which is displaceable in {HEAD ~ any direction} in a cage formed by the guiding plate 4 a and the guiding baffle 4 b 
The maneuverability is achieved by a substantially disc shaped { TAIL ~ inner part } 3 , which is displaceable in { HEAD ~ any direction } in a cage formed by the guiding plate 4 a and the guiding baffle 4 b
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH