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A. Abutment In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch ...
Kinetics study of a palladium–nickel colloidal nanocatalyst synthesized by a wetchemical method for reduction of nitrophenol, nitroaniline, and 4nitrobenzo15 ...
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Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch ...
Energy Information Administration EIA Official Energy Statistics from the Government
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