| 摘要 |
The volume and velocity of a free flowing body of water, such as a river or the like, moving in one direction past a control point are there reduced and retarded by diverting part of the volume of water, amplifying its velocity, linearizing its flow characteristics, and directing this modified flow back into the main body of liquid at such an angle as to create in the body of the stream, at the control point area, a zone of compound flows which through turbulence, drag, and other fluid phenomena materially obstruct and retard the flow through the control area.
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