MDS 621.406

Wording: Applied science & technology Engineering Applied physics Engines, Power Plants, Tools Not set Turbines, Turbomachinery

Dewmoji: 💡🔩🏭???

0 Computer science, information & general works 252,013 ℹ️	1 Philosophy & psychology 270,129 🧠	2 Religion 681,242 🙏	3 Society, government, & culture 1,328,382 👫	4 Language 209,883 💬	5 Natural sciences & mathematics 431,918 🔬	6 Applied science & technology 940,635 💡	7 Arts & recreation 1,031,850 🎨	8 Literature & rhetoric 1,436,736 📚	9 History & geography 837,760 🗺️
60 Technology 9,943 💡	61 Medicine & health 306,082 💉	62 Engineering 157,979 🔩	63 Agriculture 88,093 🌱	64 Home economics & family management 172,237 🏠	65 Management & public relations 145,064 👔	66 Chemical engineering 19,470 🚀	67 Manufacturing 8,724 📦	68 Manufacture for specific uses 20,805 🔨	69 Buildings 12,238 👷
620 Mechanical & Civil Engineering 21,480 🔩	621 Applied physics 47,082 🏭	622 Mining and related operations 3,895 🕳	623 Military Vehicles: Land, Air, & Sea 15,890 ⚓	624 Bridges & Tunnels 8,105 🌉	625 Railroads, Subways, Roads 6,655 🛤	626 [Formerly: Canal Engineering] 83	627 Dams, Lighthouses, Drilling Platforms 1,873 🌊	628 Water Treatment & Waste Disposal 7,319 🚽	629 Transportation Vehicles 45,597 🌿
621.0 1,207	621.1 Steam engineering 687	621.2 Hydraulic machinery 291	621.3 Electronics & Computers 33,501	621.4 Engines, Power Plants, Tools 4,105	621.5 Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery 454	621.6 Fans (Machinery) and Pumping machinery 161	621.7 Production engineering and Factories and Machine-shop practice 182	621.8 Machine Engineering 2,644	621.9 Machine-tools 1,518
621.40 962	621.41 Calorie engines 2	621.42 Stirling Engines 14	621.43 Internal combustion engines 722	621.44 Geothermal Energy 57	621.45 Windmills 126	621.46 Electric Motors 233	621.47 Solar Energy 374	621.48 Nuclear Engineering 1,148	621.49 2
621.400 7	621.401	621.402 Thermodynamics 879	621.403	621.404	621.405	621.406 Turbines, Turbomachinery 72	621.407 1	621.408	621.409 1
621.4060 1	621.4061	621.4062	621.4063	621.4064	621.4065	621.4066	621.4067	621.4068	621.4069