A bulldozer is a crawler (continuous tracked tractor) equipped with a substantial metal plate (known as a blade) used to push large quantities of soil, sand, rubble, or other such material during construction or conversion work and typically equipped at the rear with a claw-like device (known as a ripper) to loosen densely compacted materials.

Bulldozers can be found on a wide range of sites, mines and quarries, military bases, heavy industry factories, engineering projects and farms.

The term "bulldozer" is often used erroneously to mean any heavy equipment (sometimes a loader and sometimes an excavator), but precisely, the term refers only to a tractor (usually tracked) fitted with a dozer blade.

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Make:	NIKON CORPORATION
Model:	NIKON D7000
Exposure:	0.003 sec (1/320)
Aperture:	f/4.0
ISO Speed:	100
Focal Length:	24 mm
Lens:	18.0-105.0 mm f/3.5-5.6