Why should bulldozers install tracks instead of 4 wheels?
Bulldozer is a road machine equipped with a push and shovel device in front of a tractor. It is used for pushing the soil and smoothing the construction site.In the mid 1870s, the United States had used rough horse drawn earth scraper to smooth the land.
In 1906, caterpillar tractor inventor, Holt in the United States have developed a gasoline engine tractor first, Holt worked as a supporting device mounted on the tractor dozer, and become the world's first bulldozer.In 1909, Germany began to build a large scale highway network, because of the first World War, the project was not completed until 1921.
Germany began to use bulldozers extensively in the project. After 1945, in the reconstruction of Britain and Europe, as well as many construction projects in the United States, bulldozers were indispensable and important construction methods.At present, some countries are testing a kind of underwater bulldozer which is controlled by television and operated by robots.
