An automatic table tennis ball server is designed by using infra-red sensor and a few electric devices.

利用红外光传感器和较少的电子器件，设计了一种乒乓球全自动供球器。

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Night-vision lets the driver see up to five times as far, using a passive infra-red sensor.

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Patrons can browse through a menu on their table, or type text, with the help of that all-important infra-red sensor, with the information sent back to waiting staff.

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