{HEAD ~ a cartridge} containing {TAIL ~ a biologically compatible compressed gas}, said cartridge being attachable to said pressure supply conduit for communicating said pressurized gas from said cartridge to said pressure supply conduit 
containing
{ HEAD ~ a cartridge } containing { TAIL ~ a biologically compatible compressed gas } , said cartridge being attachable to said pressure supply conduit for communicating said pressurized gas from said cartridge to said pressure supply conduit
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH