The sliding frames are provided for {TAIL ~ movement} at an angle of 120 in {HEAD ~ different directions} perpendicular to the pitch, respectively 
The sliding frames are provided for { TAIL ~ movement } at an angle of 120 in { HEAD ~ different directions } perpendicular to the pitch , respectively
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH