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2. Box blade - Wikipedia

   en.wikipedia.org/wiki/Box_blade

   Most major tractor implement manufacturers make box blades, including Cammond, Woods, Gannon, & BushHog. Commercial laser guided models are coming into use which automatically level the blade via reference to an external laser. Three point road graders can be viewed as a specific type of box blade, and are used to grade and maintain dirt and ...

3. Wheel tractor-scraper - Wikipedia

   en.wikipedia.org/wiki/Wheel_tractor-scraper

   A twin engined Terex TS-14b scraper in Hudson, Ohio. In civil engineering, a wheel tractor-scraper (also known as a land scraper, land leveler or tournapull) is a type of heavy equipment used for earthmoving.

4. Grader - Wikipedia

   en.wikipedia.org/wiki/Grader

   Grader at work. In civil engineering "rough grading" is performed by heavy equipment such as wheel tractor-scrapers and bulldozers.Graders are used to "finish grade", with the angle, tilt (or pitch), and height of their blade capable of being adjusted to a high level of precision.

5. Harrow (tool) - Wikipedia

   en.wikipedia.org/wiki/Harrow_(tool)

   The disk harrow is used first to slice up the large clods left by the mould-board plough, followed by the spring-tooth harrow. To save time and fuel they may be pulled by one tractor; the disk hitched to the tractor, and the spring-tooth hitched to, and directly behind, the disk. The result is a smooth field with powdery dirt at the surface.

6. Laser level - Wikipedia

   en.wikipedia.org/wiki/Laser_level

   The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...

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