, equipment, materials, and work areas Mix, pour and place concrete, gravel and other materials using hand tools Join, wrap... and seal sections of pipe Perform a variety of routine, non-machine tasks, such as removing forms from set concrete, filling...
, equipment, materials, and work areas Mix, pour and place concrete, gravel and other materials using hand tools Join, wrap... and seal sections of pipe Perform a variety of routine, non-machine tasks, such as removing forms from set concrete, filling...