drainage hole

常见例句

Watch out! You almost fell into the drainage hole.
小心！你差点掉到下水道里去了。
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According to seepage theory, the gas seepage from drainage hole along coal seam is studied by means of electrical simulation experiment.
根据渗流理论，本文对沿层抽放钻孔周围的瓦斯渗流问题进行了电模拟实验研究。
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Then using the superposition principle of well group, the analytic theory of single drainage hole is spread to multiple drainage holes in the element.
然后，应用井群的叠加原理，将单个排水孔的解析理论推广到单元内多个排水孔的情况。