| 摘要 |
For the construction of the curved irrigation waterway with straight chanpel units and application of the approximate curve theory, each of connecting cross sections of the framework is calculated by the corelation of alpha=360 deg.F on the radius of a required curvature and the ratio coefficient of the center axis line length of the split waterway unit to circumference (2πR), F=center axis line length of split waterway pipe/2πR. The straight channel unit section is made for the outer wall of the currce to longer than the inner wall.
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