However, the initial working at this mine did not experience strata control problem because the void remained, relatively, small resulting less disturbance in the intact overlying strata.
然而,在这个矿井的初步工作没有岩层控制的问题,因为经验的空白依然存在,相对而言,造成不小的扰动完整的覆层。
The oxygen transfer coefficient is bigger relatively because of its big void rate and specific surface area.
该填料因具有较大孔隙率和比表面积且结构呈针状,对大气泡可有效切割,氧传递系数较大。
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