In this paper, an infrared safety device is developed to fit the for - ging press mechanism. The device has the advantage of quick action, square light screen and breakdown self check.

本文研制设计了适合冲压机械的红外光安全装置，此装置具有动作速度快、矩形光幕、故障异或逻辑自检等优点。

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They reflect a concentrated beam of light onto the town's central square, creating an area of sunlight roughly 600 square meters.

它们将一束集中的光线反射到城镇的中心广场上，形成面积大约为600平方米的阳光区域。

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Together, they can give light to an area of up to 6,400 square kilometers on the Earth for 24 hours.

它们合在一起可以给地球上高达6，400平方公里的区域提供24小时的照明。

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Another innovation: square tiles of light that could replace fluorescent office ceiling lighting.

FORBES: Lighting's Eye-Popping Future

The investment led to the creation of Steiner Studios, a 15-acre film production facility that includes five soundstages and office and support space, hundreds of thousands of square feet of new light-manufacturing space, the planned 220, 000-square-foot green manufacturing center, and the planned redevelopment of Admiral's Row into a supermarket and retail center.

WSJ: New Project Brings Anchor To Navy Yard

When an Egyptian news channel reflecting the aims of the Tahrir Square revolutionaries introduced some light relief to the schedules, it inadvertently created a new star more popular than the news coverage.

BBC: Egypt's chef leading a 'kitchen uprising'