However, it is also within the scope of the present invention to provide a direct source of reactant gas from {HEAD ~ high pressure storage devices} such as cylinders, {TAIL ~ tubes} or direct vaporization of gas stored as a liquid 
such as
However , it is also within the scope of the present invention to provide a direct source of reactant gas from { HEAD ~ high pressure storage devices } such as cylinders , { TAIL ~ tubes } or direct vaporization of gas stored as a liquid
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 HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH