blade brick-cutter bricks circular circular-saw cutting dampen danger Dirt dirty dust ear-protection electrical equipment machine noise Noisy pavers paving power powerful protected protection protective safety safety-equipment safety-gear water wet work working workman boots brush cutter engine fuel fuelled gasoline-engine line trimmer line trimmers motor motorised motorized outdoor power equipment petrol engine protective clothing protective gear safety colours shaft spinning strimmer string trimmer trimmer weed wacker whipper snipper work clothes branches chipper chipping chipping-machine chips cover covered covering dangers feeding helmeted helmets high-pressure improvement machinery maintenance men-at-work outdoor-power-equipment power-equipment protective-clothing protective-gear pushing risks risky safety-colours spray sunlight sunshine tools tree tree-branches tree-loppers tree-lopping wood-chipper wood-chipping wood-chipping-machine chain-saw ear-muffs grinder stumpgrinder work-clothes workers workmen Aerospace Industry air Air Vehicle airplane airport chassis construction flying fuselage hangar machine part Maintenance Check no people Part Of Place of Work. preparation repairing runway service technology undercarriage wheel