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a. A coarse screen made of parallel or crossed bars to prevent passing of
oversized material.
b. A series of parallel and crossed bars used as platform or walkway
floors or as coverings for pits and trenches over which traffic can pass;
generally removable to permit access to conveying equipment for servicing.
c. A series of parallel and/or crossed bar units fastened to or propelled
by a conveying medium, used for carrying large lump-size bulk material or
objects. They usually permit passage of air for cooling or for heat to
maintain temperature.
d. The act of sorting ores by means of grates.
Source:
Dictionary of Mining, Mineral, and Related Terms
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