Perfection and betterment of the extreme hypotheses on the problem of hydraulicgeometry.
极值假说在研究河相关系问题上的完善与改进。
2
Combined with resistance equation of channel and critical incipient shear stress, the method of designing hydraulicgeometry of stable channel is set up in this paper.
结合渠道阻力关系及临界起动切应力，可得到稳定渠道水力几何形态设计的方法。
3
Hydraulic valve block balance weight piston sleeve has thin wall, high precision of geometry dimension and strict roughness, and its quality determines the lifetime of balance weight directly.