Ключевые слова: 2024 years, 2529 years, 3539 years, arms crossed, blueprint, casual clothing, cheerful, chinese ethnicity, clipboard, color image, confidence, construction, construction worker, coworker, four people, friendship, front view, glove, happiness, hardhat, headphones, holding, horizontal, looking at camera, manual worker, mask, mid adult men, occupation, photography, pride, protective eyewear, protective glove, protective work wear, reflective clothing, rolled up, safety, selective focus, smiling, standing, strength, studio shot, teamwork, three quarter length, togetherness, toothy smile, white background, working, writing, young men, young women,