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acetylene, bright, burner, collar, construction, cut, danger, dangerous, equipment, factory, fire, flame, flare, foundry, fumes, gas, glow, hot, industrial, industry, iron, job, liquid, machinist, manual, manufacturing, metal, metallurgy, metalworking, molten, oxygen, pipe, process, production, profession, propane, protective mask, red, repair, rust, shield, skill, spark, steel, tools, torch, weld, welder, welding, yellow,