| http://www.w3.org/ns/prov#value | - FIG. 5B illustrates an alternate embodiment of the present invention of a system 550 having an air input 552 that may take ambient air, which, of course, is comprised of about 70% nitrogen gas and smaller amounts of oxygen, carbon dioxide and other gases, and may feed the air into the heater 512 and, subsequently, into the rail tank car 502, in the same manner as described above with reference to
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