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velocity for erosion and sedimentation control
释义
velocity for erosion and sedimentation control
Encyclopedia
工学
农田排水
释
velocity for erosion and sedimentation control
不冲不淤流速
保证排水沟道正常工作,不发生冲刷或淤积现象的限值流速。又称允许流速。
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sexual behaviour
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