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An unfamiliar piece of equipment

不熟悉的设备

A: I haven't seen this machine before. What's it used for?

A:我以前从来没有见过这个机器。它做什么用的？

B:It's a really useful piece of equipment. It's for smoothing rough edges. Here let me show you how it works. It's very simple to operate.

B:这是设备上一个很有用的零件。它是用来修整毛边的。让我给你演示一下它是如何工作的。很容易操作的。