{HEAD ~ The desired residence time} within the cracking chamber, which is {TAIL ~ the time} available for photolysis should be in the range of a few milliseconds to several hundred milliseconds 
is
{ HEAD ~ The desired residence time } within the cracking chamber , which is { TAIL ~ the time } available for photolysis should be in the range of a few milliseconds to several hundred milliseconds
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH