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ลำดับที่LC 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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