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.
互联网
Formula design, preparation and basic properties of solvent based adhesive used for PVC U - pipe are described.
介绍了PVC -U 管用溶剂型胶粘剂的配方设计, 配制方法及其基本性能.
互联网