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shortwall

[shawrt-wawl]
adjective Mining.
  1. pertaining to a means of extracting coal when the working face is about a third the length of the longwall system and mining is done by a continuous cutter rather than by longwall machinery.
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Origin of shortwall

First recorded in 1910–15; short + wall
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018