My partner says no because the boiler could go, or the roof fall off, and we have no savings to save us.
我的另一半说不,因为锅炉可能会坏掉,屋顶可能会掉下来,而我们没有可用以自救的储蓄。
The II3123 face is a light type caving face of three-soft coal seam. the roof is cracked, sloughing and roof fall often occur.
前言: 石台煤矿II3123工作面为“三软”煤层轻放工作面,顶板破碎易掉,片帮、冒顶时常发生。
The sound emission characteristics and the causes for incorrect prediction of the stope roof fall at Tonglushan Mine were analysed.
对铜绿山矿采场冒顶的声发射特征和预报不准的原因进行了分析。
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