Backhoe
Actual equipment: tractor with digging arm attachment
A veihicle that has a arm-like attachment that can dig below the serface. Usually a Tractor with a Front-end Loader on the front, and a backhoe on the rear. Can also refer to a tracked machine with a backhoe up front, but is usually referred to as a Excavator
"We need to dig a trench for the pipe, so we are using a backhoe