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