The pot like {TAIL ~ housing} is closed by {HEAD ~ a cover} 4 which has an inlet port 5 for compressed air from a compressed air appliance 
The pot like { TAIL ~ housing } is closed by { HEAD ~ a cover } 4 which has an inlet port 5 for compressed air from a compressed air appliance
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH