The design and calculation method of small jet stone pump system were discussed in this paper.
讨论了小型射流吸石泵系统的设计计算方法。
Design and calculation method of the key parameter such as the diameter of roller and pulling force are given.
介绍两辊式和三辊式机械弯曲除锈原理，给出关键参数如辊子直径、牵引力等的设计计算方法。
Compared with mountain tunnel and shield tunnel, the design and calculation method of immersed railway tunnel differs greatly.
铁路沉管隧道的设计与计算方法，与山岭隧道、盾构隧道相比有很大差异。
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