Virtual endoscope display can observe the inner surface of the pipe dynamically and directly.

虚拟内窥显示可动态地观测到管道内表面，更为形象直接。

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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