英语词汇“drainage hole”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	drainage hole
释义	Drainage hole Drainage hole A hole in a retaining wall; an open joint in masonry, to drain unwanted water. drainage hole An opening in a construction which permits unwanted water to drain away, e.g., from behind a retaining wall.
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Drainage hole