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