介绍了一种加工孔内键槽的新方法和相应的专用工具。不但可用来加工通孔内的键槽，而且还能用来加工盲孔内的键槽或有障碍台肩的孔内键槽等。

The new method for machining keyway in holes and the special tool is presented, with which the keyway not only in blind holes but also in shoulder holes can be machined.

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一台机器能真正打破语言障碍？

Could a machine really break down language barriers?

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它还配有热成像系统以便定位生还者，同时，它还能通过配备的云台摄像机来记录障碍物。

It has a thermal camera to locate survivors and a pan-and-tilt camera to record obstacles.

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