Ключевые слова: arm, autumn, backhoe, blue, bucket, city, civil engineering, construction, construction machinery, construction site, construction vehicle, digger, digging, dredging, embankment, engineering, excavator, ground, heavy, heavy machinery, hydraulic, hydraulic excavator, hyogo prefecture, industry, japan, landscape, machine, machinery, muko river, operation, operator, park, pond, reflection, river, river conservation work, riverbank, riverbed, sand, scoop, shovel, sky, soil, sunny, vehicle, water, water surface, wood, work, yellow,