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