The paper discussed the design of U-pipe bending machine based on hydraulic pressure automatic-control system.
本文介绍了基于液压控制系统的自动U型弯管机的设计。
2
An unsteady heat transfer model was sot up and solved by numerical solution for the heat transfer characteristic of U-pipe heat exchanger and the interaction of the two pipe legs of the GSHPs.
针对U型管埋地换热器的传热特点，考虑了两管脚之间的相互影响，建立起非稳态传热模型。
3
This paper mainly discusses the damaged PVC pipe maintenance methods-U the related content.