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