E21C27/00—Machines which completely free the mineral from the seam
E21C27/02—Machines which completely free the mineral from the seam solely by slitting
E21C27/04—Machines which completely free the mineral from the seam solely by slitting by a single chain guided on a frame with or without auxiliary slitting means
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Engineering & Computer Science
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Mining & Mineral Resources
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Mechanical Engineering
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Life Sciences & Earth Sciences
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General Life Sciences & Earth Sciences
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Geochemistry & Mineralogy
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Geology
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Debarking, Splitting, And Disintegration Of Timber
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