{HEAD ~ A two piece housing} defines {TAIL ~ a cavity} containing electric switch elements and a detent mechanism positioned for optimum characteristics 
defines
{ HEAD ~ A two piece housing } defines { TAIL ~ a cavity } containing electric switch elements and a detent mechanism positioned for optimum characteristics
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH