| http://www.w3.org/ns/prov#value | - Measurement of the ash content of coal International Nuclear Information System (INIS) A monitor for determining the ash content of coal in wagons consisting of a structure including means for irradiating each wagon as it passes the structure with a known dose of neutrons, means for detecting and measuring the intensities of ?-rays emitted by ash-forming elements in the coal, and means for providi
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