GK: Neuer
CB: Thiago Silva
CB: Sergio Ramos
RB: Lahm
LB: Ashley Cole
CDM: Xavi
CAM: Iniesta
RM: Arjen Robben
ST: Leo Messi
ST: Falcao
They dig
Megadiggers, cranes, trencher/rotating shovel and diggers. Mountain bikes and car brakes use Hydraulics too.
Their applications are numerous, including the following:demolishing buildingslaying and placing pipedigging holes and trenchesuprooting trees and other forestry workdredging waterwayshandling materialsFor more you might wish to read the excavator article on wikipedia.
The track distribute the weight evenly across the length of the vehicle, and across a surface which has more points of contact with the ground than conventional wheels. This reduces ground pressure, which makes the vehicle less likely to sink deeply into dirt and other types of soft ground.