Curious about laser level? Watch the demo and Learn How To Use Laser Levels. In surveying and construction, the laser level is a control tool consisting of a laser beam projector. The tool is leveled according to the accuracy of the device and projects a fixed red or green beam about the horizontal and/or vertical axis.
Stairs are so pedestrian. Here is an alternative that will give you a lift.
In the small village of Nashtifan, Iran, some of the oldest windmills in the world, with what may be the earliest windmill design in the world, still spin.
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