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