head conduit

For high-head and long-distance head conduit of hydroplant, using backfill-conduit form can reduce project cost and accelerate construction progress obviously.

高水头、长距离引水的水电站压力管道采用回填管形式可明显地降低工程造价，加快施工进度；

Andy squeezes through the hole head-first, emerges to the waist, He reaches for the opposite wall, manages to snag a steel conduit with his fingers.

安迪挤出隧道，先是头，接着是腰。他碰到了对面的墙，设法用手指抓住一根钢管。

The Optimization Analysis of Weld Residual Stress for Head Conduit

压力管道焊缝残余应力的优化分析

Based on three-turbulence numerical simulation technique, the internal pattern and hydraulic characteristics were studied about new style outlet conduit namely called tank-like outlet passage which has been used in special low-water head city flood prevention pumping station for recent years.

运用三维湍流数值模拟的方法，对近年来应用于特低扬程大型泵站中的一种新型出水流道&箱涵式出水流道内流场特征及水力特性进行分析研究。

Moreover, the earth-rock backfill of head conduit can recover early plant cover, and the layout is fit for terrain where topographical falling gradient is less than 20 degrees.

同时，回填管回填土石后，能够恢复原来植被，保护生态环境，且较适于地形坡度小于20°地面布置。