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1. US and Canadian a small natural drainage way or gully
2. a defect found in metal castings due to the contraction of the metal on solidification
To haul a load.
A fissure or pocket in a casting formed when the supply of molten metal is inadequate during solidification.
To remove a pattern from a foundry flask.
To remove timber supports, allowing overhanging coal to fall down for collection.
To allow ore to run down chutes from stopes, chambers, or ore bins.
To collect broken coal in trucks.
To hoist coal, rock, ore, or other materials to the surface.
The horizontal distance to which creep extends on the surface beyond the stopes.