{HEAD ~ The device} 4, characterized by the fact that the lever is in a position which covers the control end of the adjusting screw when the sliding element is in {TAIL ~ the position} in which it engages the coupling means 
{ HEAD ~ The device } 4 , characterized by the fact that the lever is in a position which covers the control end of the adjusting screw when the sliding element is in { TAIL ~ the position } in which it engages the coupling means
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH