Wedge-shaped narrowing unit for use in water power plate for increasing flow of steaming water, has two side walls and lower base which forms river channel or smooth concrete surface

摘要

The wedge-shaped narrowing unit has two side walls (1,2) and a lower base which forms river channel or a smooth concrete surface. The side walls are supported rotatably so that the narrowing unit is pivoted from a maximum opening angle of 30 degree.