raise
A vertical or inclined opening in a mine driven upward from a level to
connect with the level above, or to explore the ground for a limited
distance above one level. After two levels are connected, the connection
may be a winze or a raise, depending upon which level is taken as the
point of reference.
rod mill
A mill for fine grinding, somewhat similar to a ball mill, but
employing long steel rods instead of balls to effect the grinding.
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