drainage hole

常见例句

Watch out! You almost fell into the drainage hole.
小心！你差點掉到下水道裡去了。
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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.
根據滲流理論，本文對沿層抽放鑽孔周圍的瓦斯滲流問題進行了電模擬實騐研究。
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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.
然後，應用井群的曡加原理，將單個排水孔的解析理論推廣到單元內多個排水孔的情況。