... bottom discharge orifice 泄水底孔 mid-discharge orifice 泄水中孔 flow discharge through dam orifice 坝身孔口泄流 ...
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mid-discharge orifice
mid-discharge孔
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The outline of the masonry arch dam is double-curved, the dam body is impervious, the crest spillway is built of slotted-type bucket and the mid-discharge orifice is slit-type bucket.
模型试验和实际运行表明，浆砌石拱坝体型、坝体防渗及泄水建筑物等设计是成功的。
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