{HEAD ~ The detector} includes a microswitch having {TAIL ~ a sensing arm} which contacts a center portion of an elastic membrane 
{ HEAD ~ The detector } includes a microswitch having { TAIL ~ a sensing arm } which contacts a center portion of an elastic membrane
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH