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- W30898973 abstract "A noncontacting sensor having a measurement range of 0 to 6 in or more, and with an accuracy of 0.5 in or better is needed to control the machinery used in modern coal mining so that the thickness of the coal layer remaining over the rock is maintained within selected bounds. The feasibility of using the radiofrequency resonance absorption (RRAS) techniques of electron magnetic resonance (EMR) and nuclear magnetic resonance (NMR) as the basis of a coal thickness gauge is discussed. The EMR technique was found, by analysis and experiments, to be well suited for this application." @default.
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- W30898973 date "1978-01-20" @default.
- W30898973 modified "2023-09-27" @default.
- W30898973 title "Coal thickness gauge using RRAS techniques, Part 1. Final report" @default.
- W30898973 hasPublicationYear "1978" @default.
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