Drilling; rock drilling; advisory services relating to excavating; excavating; land excavating; rental of earth-moving and excavating machines; rental of excavating machines; advisory services relating to pipe laying; installation of pipelines; laying of pipelines; pipe installation services; pipe laying services; pipeline construction; pipeline laying; civil construction services; underground civil engineering services; earthmoving; groundwork; laying of cables; plant hire; public works; rental of construction machinery; underground construction