问题
单项选择题
采煤工作面的最优排尘风速为()。
A.(0.25—1)m/s
B.(0.5—1.2)m/s
C.(1.2—1.5)m/s
D.(1.6—2)m/s
答案
参考答案:D
采煤工作面的最优排尘风速为()。
A.(0.25—1)m/s
B.(0.5—1.2)m/s
C.(1.2—1.5)m/s
D.(1.6—2)m/s
参考答案:D
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