Ключевые слова: alert, blade, brick, build, builder, building, carpenter, caution, cement, contractor, counterweight, crane, cutting, door, emergency, employer, equipment, fire, girder, hacksaw, hand, hook, house, hydrant, interior, ladder, lifting, machine, metal, mixer, people, pickaxe, pipe, plaster, pliers, plumbing, property, rock, saw, sign, spanner, stairs, steel, tools, warning, wood, work, worker, workshop, wrench,