I prefer to employ a shorter LES because placing a limitation on its travel allows variations in its length to control {HEAD ~ the angular relationship} between {TAIL ~ the pleating elements} and the main blade 
I prefer to employ a shorter LES because placing a limitation on its travel allows variations in its length to control { HEAD ~ the angular relationship } between { TAIL ~ the pleating elements } and the main blade
OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH