Cage In a mine shaft, the device, similar to an elevator car, that is used for hoisting personnel and materials. Calorific value The quantity of heat that can be liberated from one pound of coal or oil measured in BTU's. Cannel coal A massive, non caking block coal with a fine, even grain and a conchoidal fracture which has a high percentage of hydrogen, burns with a
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The metal smelting and refining industry processes metal ores and scrap metal to obtain pure metals. The metal working industries process metals in order to manufacture machine components, machinery, instruments and tools which are needed by other industries as well as by the other different sectors of the economy.
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This page contains a numerical NAICS code list 2017. Users can view and lookup an index of 2017 NAICS codes in numerical order.
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 of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs
quot;The technology is very practical and uses icon based instructions. This makes it possible to vary shot sizes for any of the different cleaning methods including spray cleaning, bucket cleaning or scrubber driers, but it requires min imal user training or quot;SmartDose also dramatically reduces the environmental footprint of all its users.
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Withdrawn Standards. ANSIZ41 99 American National Standard for Personal Protection Protective Footwear. A4 Withdrawn 1965 Specification for Medium Carbon Steel Splice Bars
A . Abbe's Principle . aberration . ablation . ablator . ABM . abnormal explosion
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