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