The Encyclopedia Americana: The International Reference Work, Volume 7Americana Corporation, 1955 - Encyclopedias and dictionaries |
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Page 145
Coals having a FC : VM ratio over 69:31 are classed according to this ratio , regardless of their heating value ; below ... 3 The major distinction between lignite and brown coal is that the former is consolidated , while the latter is ...
Coals having a FC : VM ratio over 69:31 are classed according to this ratio , regardless of their heating value ; below ... 3 The major distinction between lignite and brown coal is that the former is consolidated , while the latter is ...
Page 155
wide ) carrying six cutting chains cuts into the bottom of the face for a depth of 18 inches and rises to the top of the face , cutting out and breaking a channel of coal which the cutter chains , serving as a conveyer belt , deliver to ...
wide ) carrying six cutting chains cuts into the bottom of the face for a depth of 18 inches and rises to the top of the face , cutting out and breaking a channel of coal which the cutter chains , serving as a conveyer belt , deliver to ...
Page 158
Inc. , consisting of the presidents of nine of the leading coal - carrying railroads and five of the largest coal companies in the United States , has sponsored the development of a locomotive - size gas turbine fueled with pulverized ...
Inc. , consisting of the presidents of nine of the leading coal - carrying railroads and five of the largest coal companies in the United States , has sponsored the development of a locomotive - size gas turbine fueled with pulverized ...
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