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