The device further comprises {HEAD ~ means} of filling the enclosure with an explosive gaseous mixture, firing means designed to set off the explosion of {TAIL ~ the said mixture} and a remote communication system 
The device further comprises { HEAD ~ means } of filling the enclosure with an explosive gaseous mixture , firing means designed to set off the explosion of { TAIL ~ the said mixture } and a remote communication system
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 TAIL OTH OTH OTH OTH OTH