It's refro escabado is incorrectly written and should be written as "retro dug" being its meaning:
refro escabado = retro escavadoRelativo or belonging to the retroexcavadoraLa backhoe loader is a machine that is used to perform excavations on land. It is a variant of the shovel excavator.The backhoe is commonly used in works for the earthmoving, make ramps to solar, or to open grooves for the passage of pipes, cables, drains, etc, as well as also to prepare the sites where the foundations of the buildings sit.The machine sinks field a spoon that starts what drag and deposited inside.The chassis can be mounted on chains or tyres. In the latter case they are equipped with hydraulic jacks to secure the machine to the ground.Backhoe, unlike the front tiller, affects the field digging up down. It is used for earth moving at a level lower than the level of support, or a little higher than that.
