MDS621.130973

Expresiones: Ciencias aplicadasEngineering and allied operationsApplied physicsSteam engineeringLocomotive EnginesGeneralitiesHistorySin especificarSin especificar

Dewmoji: ?????????

0 Obras generales y ciencias de la información 216,948 ℹ️	1 Filosofía 229,419 💭	2 Religión 562,779 🙏	3 Sociología 1,169,921 👫	4 Filología 177,109 💬	5 Ciencias naturales 380,441 🔬	6 Ciencias aplicadas 844,132 💡	7 Bellas artes 857,504 🎨	8 Literatura 1,201,263 📚	9 Historia 703,933 🗺️
60 General Technology 8,586 💡	61 Medicine and health 277,111 💉	62 Engineering and allied operations 140,868 🔩	63 Agriculture & related technologies 78,723 🌱	64 Home and family management 152,587 🏠	65 Management and auxiliary services 131,640 👔	66 Chemical Technology 17,794 🚀	67 Manufacturing 7,692 📦	68 Manufacture of products for specific uses 18,201 🔨	69 Building 10,930 👷
620 Engineering 19,566 🔩	621 Applied physics 42,616 🏭	622 Mining Engineering and Mines and Mineral Resources 3,424 🕳	623 Military Engineering and Marine Engineering 13,937 ⚓	624 Civil Engineering 7,390 🌉	625 Road and Railroad 5,150 🛤	626 unassigned since 1911 7th Edition (was Canal Engineering) 72 🤷	627 Hydraulic Engineering 1,678 🌊	628 Sanitary; Municipal 6,571 🚽	629 Other Branches 40,464 🌿
621.0 1,143	621.1 Steam engineering 567	621.2 Hydraulic machinery 238	621.3 Electrical, magnetic, optical, communications, computer engineering; electronics, lighting 30,327	621.4 Heat engineering 3,663	621.5 Pneumatic machinery and Compressed air and Refrigeration and refrigerating machinery 415	621.6 Fans (Machinery) and Pumping machinery 142	621.7 Production engineering and Factories and Machine-shop practice 155	621.8 Machine Engineering 2,398	621.9 Machine-tools 1,300
621.10 Power plants: Central Stations 69	621.11 Mechanism of Steam engine. Design of engine parts	621.12 Marine Engines and Ship Propulsion 9	621.13 Locomotive Engines 85	621.14 Traction Engines (agricultural, road rollers, etc. 6	621.15 Portable Engines	621.16 Stationary Engines 28	621.17 Steam Economy	621.18 Steam Generation. Boilers, Furnaces 65	621.19 Steam Heating 46
621.130 Generalities 30	621.131 Railway Locomotives 1	621.132 Light Locomotives -- Mining, Lumbering, etc. 25	621.133 Locomotive boilers. Production of steam 2	621.134 Engine of the locomotive 4	621.135 Running gear	621.136 Tenders	621.137 Management of Locomotive. engineer's and fireman's duties. Assignment of Crews, etc.	621.138 Maintenance and repair of locomotives	621.139 Supplies. Materials
621.1300	621.1301	621.1302	621.1303	621.1304	621.1305 Periodicals	621.1306 Societies	621.1307	621.1308	621.1309 History 30
621.13090	621.13091	621.13092	621.13093	621.13094 14	621.13095	621.13096 1	621.13097 8	621.13098	621.13099 2
621.130970	621.130971 1	621.130972	621.130973 5	621.130974	621.130975	621.130976	621.130977	621.130978	621.130979 1