Another object of this invention is to provide a reel device, as aforesaid, having {HEAD ~ a tubing reel} which selectably pays out or retracts {TAIL ~ gas tubing} in a manner which minimizes or even precludes tangling or pinching of the tubing 
selectably pays out
Another object of this invention is to provide a reel device , as aforesaid , having { HEAD ~ a tubing reel } which selectably pays out or retracts { TAIL ~ gas tubing } in a manner which minimizes or even precludes tangling or pinching of the tubing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH