inlets for {TAIL ~ external supplies} of inert gases in {HEAD ~ the downward extending section} of the cylinder, 
inlets for { TAIL ~ external supplies } of inert gases in { HEAD ~ the downward extending section } of the cylinder ,
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH