408.2 Structural Members and Shapes - 538.2.1 Welding Processes - 545.3 Steel - 631.1 Fluid Flow;
General - 641.2 Heat Transfer - 701.1 Electricity: Basic Concepts and Phenomena - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 817.1 Polymer Products - 819.4 Fiber Products - 951 Materials Science;