It is common in woodworking, metalworking, and other similar trade and hobby tasks. It has excellent metalworking, forming and machining properties. Metallurgy is distinct from the craft of metalworking. A combination square is a tool used for multiple purposes in woodworking, stonemasonry and metalworking. Generally speaking, spindle speeds and feed rates are less critical in woodworking than metalworking. The city's industries include shipbuilding, oil refining, chemicals, metalworking, and food processing. Other leading industries are metalworking, electricity generation, and chemical manufacturing. Other remarkable industries are building materials, metalworking and food processing. There are many variants of lathes within the metalworking field. Their economy was based on agriculture, salt mining, trading, metalworking, and manufacturing. Forging is one of the oldest known metalworking processes. Metalworking and shipbuilding became much more developed. Smithing is one of the oldest metalworking occupations. Food processing, timber, and metalworking industries are also well-developed. In Greek mythology, Aphrodite was married to Hephaestus, the god of blacksmiths and metalworking.