Ключевые слова: aerial, agricultur, agricultural, agriculture, aircraft, airplane, application, aviation, biplane, chemical, chemicals, control, country, crop, cropduster, dangerous, ddr, duster, environment, farm, farming, fertilizer, field, flag, fly, gdr, grass, green, growth, herbicide, horizontal, industry, landscape, low, midair, outdoors, pesticide, piloting, plane, rural, space, spray, sprayer, spraying, substance, toxic, wing, wings, work, yellow,