Word:

Long wall

(Coal Mining) a working in which the whole seam is removed and the roof allowed to fall in, as the work progresses, except where passages are needed.

See also: Long

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Long primer
Long purple
Long purse
Long roll
long run
long saphenous vein
Long sea
long shot
long since
long sleeve
long suit
long time
long tom
long ton
long trousers
long underwear
-- Long wall --
long wave
long whist
long-acting
long-acting insulin
long-ago
Long-armed
long-beard
long-billed marsh wren
Long-boned shad
Long-breathed
long-clawed prawn
long-dated
long-distance
long-distance call
long-distance runner
Long-drawn
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