【Daily Topic】【HVAC Version 20160916】
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This post was last edited by hesonchang214 on 2016-11-9 at 16:11. Reward for participation: 2 wealth points. Reward for the correct answer: 9 Wealth. The most effective and fundamental dust control measure in a coal mining face is ( ). A. Water injection into coal seams B. Sprinkling water C. Spraying Correct answer: A
The most effective and fundamental dust control measure in a coal mining face is ( a ). A. Coal seam water injection B. Sprinkling water C. Spraying
The most effective and fundamental dust control measure in a coal mining face is (A)