Dies (Metal-working) 2 Extrusion 2 Machining 2 Metals 2 Steel 2 Computer-aided design 1 Cutting 1 更多 ... Design, Industrial 1 Drilling and boring 1 Electroforming 1 Engineering design 1 Finishing 1 Forging 1 Heat treatment 1 Injection molding of metals 1 Iron 1 Jigs and fixtures 1 Joints (Engineering) 1 Machine-tools 1 Machinery 1 Machinists 1 Manufacturing processes 1 Mechanical drawing 1 Metal castings 1 Metal stamping 1 Metal-spinning 1 Metal-work 1 Metal-working machinery 1 Metric system 1 Molding materials 1 少 ...