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a. Dust from rock drills, blasting, or handling rock. Fay
b. In the quantity inhaled by workers, dust may be classified as
dangerous, harmless, and borderline, although the classification is purely
arbitrary. Silica is a dangerous dust and aluminum hydroxide is
borderline. Lewis
c. Scot. Calcined ironstone screenings. Standard, 2
d. See: coal dust
Source:
Dictionary of Mining, Mineral, and Related Terms
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