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【多选题】
根据汽轮机工况，汽轮机本体疏水可分为()A.
启动疏水
B.
经常疏水
C.
自由疏水或放水
D.
汽缸缸体疏水
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A.
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B.
洞线应与最大水平地应力方向尽量垂直
C.
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D.
对低流速的隧洞，弯道曲率半径不应小于5倍洞径或洞宽
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A.
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B.
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Word
D.
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