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。

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The paper, based on scientific research practice introduces an electric control principle on automation production line, which is applied to production of pipe bending machine.

结合科研实际，介绍了一种适用于弯管机生产的自动化生产线的电控原理。

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Once a design is set, different bits of the manufacturing process are tried out on computer: a virtual pipe-bending machine, for instance, makes sure that the fuel lines which snake their way through the airframe can be created without wrapping themselves around the machine and bringing it to a halt.

ECONOMIST: Manufacturing technology