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Engineers handshaking on an oil refinery.
man, male, guy, bloke, boy, lad, people, person, young, adult, middle, aged, senior, age, mature, mid, life, midlife, caucasian, white, engineer, technician, job, profession, occupation, smiling, smiley, smile, grin, grinning, happy, cheerful, emotion, reaction, facial, expression, face, handshake, agreement, shaking, hands, shake, agreeing, agree, deal, contract, seal, greeting, welcoming, welcome, gesture, gesturing, stand, standing, stood, team, colleagues, member, coworker, co, worker, workmate, teammate, hard, hat, helmet, safety, protective, headwear, friends, mates, friendship, companion, oil, refinery, processing, refining, plant, industrial, industry, gasoline, petrol, petroleum, diesel, fuel, outside, outdoors, horizontal