{TAIL ~ Means} are provided to prevent {HEAD ~ jumping} of the belt from the second pulley when the head is in other positions 
{ TAIL ~ Means } are provided to prevent { HEAD ~ jumping } of the belt from the second pulley when the head is in other positions
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH