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ลำดับที่	LC	คำอธิบาย
121		Machine design and drawing
122		Machine construction (General)
123		Heat engines
124		Turbines. Turbomachines (General)
125		Steam engineering
126		Locomotives
127		Miscellaneous motors and engines Including gas, gasoline, diesel engines
128		Renewable energy sources
129		Hydraulic machinery
130		Vacuum technology
131		Pneumatic machinery
132		Electrical engineering. Electronics. Nuclear engineering
133		Production of electric energy or power. Powerplants. Central stations
134		Dynamoelectric machinery and auxiliaries Including generators, motors, transformers
135		Production of electricity by direct energy conversion
136		Distribution or transmission of electric power
137		Electric meters
138		Applications of electric power
139		Electric lighting
140		Electric apparatus and materials. Electric circuits. Electric networks
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