{TAIL ~ Slots} 50 52 are oriented parallel to one another and are inclined at an acute angle with respect to {HEAD ~ the horizontal direction} 
{ TAIL ~ Slots } 50 52 are oriented parallel to one another and are inclined at an acute angle with respect to { HEAD ~ the horizontal direction }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD