man as apprentice works in teamwork together at metallurgy factory

adults apprentice apprentices apprenticeship bluecollarworker cooperation dustcoat engineer engineeringequipment equipment factory fulllength horizontal indoors laborer laborprotection learning locksmithery man manager mediumgroupofpeople men metallurgical metallurgy metalwork metalworker metalworking multiethnicgroup operation profession protectiveclothing punchpress safety staff together training worker workshop workstation youngadults