Machines for public works, namely excavating machines, earth drilling machines, earth moving machines; Excavating machines; Machines for making trenches in the ground, and vertical excavation and drilling machines for public works; Rock excavation machines; Soil excavation machines; Ground drilling machines for public works; Excavation machines and power-operated drilling tools, namely, drills; Buckets for earth moving machines; Clamshell grabs being mechanical grabs for excavating machines a...