在重力输水系统的规划设计中，有时采用无压管渠与压力管道相结合的方式输水。
In the planning and design of gravity water transfer system, the combined pattern of pressure free pipe and canal with pressured pipe line is sometimes adopted to carry out water transfer.
该系统为系统深入地研究管轴压精密成形过程中无模约束自由变形机理和成形规律提供了有效的手段。
It provides an effective approach to further and systematical study of free deformation mechanism and law in tube axial compressive precision forming process.
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