Three - Beam Projector?

三束投影仪TBP ？

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You may be called on to present using no equipment or you may have a whiteboard slide projector overhead projector or beam projector available.

你也许会被叫去做演讲而不用任何设备，也可能会准备一块白板、幻灯机或投影仪。

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The front headlamps of the Concept GLA are each fitted with a laser-beam projector.

ENGADGET: Mercedes-Benz GLA concept puts laser projectors in headlights, redefines SUV

More modern versions of the tool add in a laser beam projector, which allows builders to level out the device and "draw" a long line of light across a wall, indicating an exactly level surface.

FORBES: No. 18 The Level

The MirageTable uses a 3D-video projector to beam images onto a sheet of curved white plastic placed in front of the user.

BBC: MirageTable demonstration