drainage hole

常見例句

Watch out! You almost fell into the drainage hole.
小心！你差點(diǎn)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.
根據(jù)滲流理論，本文對(duì)沿層抽放鉆孔周圍的瓦斯?jié)B流問題進(jìn)行了電模擬實(shí)驗(yàn)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，應(yīng)用井群的疊加原理，將單個(gè)排水孔的解析理論推廣到單元內(nèi)多個(gè)排水孔的情況。