{HEAD ~ A gas tubing reel} includes {TAIL ~ a housing} having a tubing reel rotatably positioned therein for unwinding and retracting tubing 
includes
{ HEAD ~ A gas tubing reel } includes { TAIL ~ a housing } having a tubing reel rotatably positioned therein for unwinding and retracting tubing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH