| http://www.w3.org/ns/prov#value | - It is, however, unnecessary to provide the black body furnace 2 with such a means, that is, it is unnecessary to control the temperature of the black body furnace 2, if the temperature of the black body furnace 2 itself it constantly monitored by a means such as a thermocouple or a black body furnace and the equation (3) is prepared by utilizing one temperature T2 from among the temperatures monit
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