Do You Know the Evolution of Excavators?
Excavator can be competent to excavate gravel, soil, ore and other types of materials, so from his birth, it has been "used", is indispensable in the construction of various projects earth moving machinery. In recent years, the excavator is ushered in the rapid development, has become one of the most important construction machinery in engineering construction. So, in the construction of the pivotal excavator, in the end, what kind of development history? Early excavators ● As early as the end of the 15th century, the prototype of excavator began to appear. In Italy, where water shipping was the main mode of transportation, silt dredges appeared. ● According to "Da Vinci's Notebook", the dredge was made of two canoes side by side, with a runner between the sides, and a bucket was installed on the runner, which was driven by human power, allowing the bucket to probe into the bottom of the river to dig the river silt and clean the river. ● The bucket capac