A land drain is usually a pipe buried in farm land but it may also be an open channel.
农田的排水系统通常是埋在农田中的管子,但也可以是明渠。The elementary equations of pressure and open-channel unsteady flow are the essential theory of hydraulic transients of hydropower station.
有压非恒定流和明渠非恒定流的基本方程是水电站水力过渡过程的基本理论。The hydrometric pendulum is sometimes used to determine flow velocities in open channels.
测流速的摆锤有时用于确定明渠中的流速。being shut off from the open Channel by a monstrous great beach or dike of pebbles, of which I shall speak more hereafter.
从一个明渠被一片广大的海滩而砾石堤所切断,我将以后再作细说。Drainage is a general term applied to fluid flow along all pipes or open channels which take liquid wastes or rain water.
排水是个通用名词,指沿各种废水或雨水管道或明渠流动的液体。Some issues to be noted for using KFT open channel flow monitoring system are also stated.
还提出使用KFT明渠流量微机监测系统应注意的几个问题。The problem on turbulent boundary layer in open-channel flow is an important element of turbulence research.
明渠紊流边界层问题是明渠紊流研究中的一项重要内容。Environmental Precautions: Remove sources of ignition. Prevent spill from entering drains or open waters.
环境预防:移开燃火点,并且防止流入明渠或者河水里面。Develop an open- cut contingency plan and detour plan in case of collapse.
制定一个明渠开挖的意外计划,和出现倒塌的绕道计划。