hydraulic track type excavator backhoe machinery working. industrial machineries working on open pit mine, ore quarry

activity backhoe blade boring bucket building bulldozer concrete construct construction digging dumper earthmover engineer engineering equipment excavation excavator gravel heavyduty highway hydraulic industrial industry loader loading machine machineries machinery manufacturing mine mining mover moving open openpit ore pit process quarry quarrying rocks sand scoop site technology track tractor transport transportation truck type unloading vehicle wheel work working works