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Anthracite Coal Crushing Line

Anthracite - coal with a volatile ratio equal to 0.12 or less. Anticlinal axis - the ridge of an anticline. ... inrushes of water or gas or to protect heading against crushing. Beam - a bar or straight girder used to support a span of roof between two ... the line which roughly follows the rear edges of coal pillar that are being mined. The ...

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