The latching means 18, 19 have guide edges 20 in {TAIL ~ their regions} facing {HEAD ~ the closing part} 16 
The latching means 18 , 19 have guide edges 20 in { TAIL ~ their regions } facing { HEAD ~ the closing part } 16
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH