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ลำดับที่	LC	คำอธิบาย
141		Electric heating
142		Telecommunication Including telegraphy, telephone, radio, radar, television
143		Electronics
144		Computer engineering. Computer hardware
145		Photoelectronic devices (General)
146		Nuclear engineering. Atomic power
147		Electricity for amateurs. Amateur constructors' manuals
148		Motor vehicles. Aeronautics. Astronautics
149		Motor vehicles. Cycles
150		Aeronautics. Aeronautical engineering
151		Rocket propulsion. Rockets
152		Astronautics. Space travel
153		Mining engineering. Metallurgy
154		Mineral deposits. Metallic ore deposits. Prospecting
155		Practical mining operations. Safety measures
156		Mine transportation, haulage and hoisting. Mining machinery
157		Ore deposits and mining of particular metals
158		Metallurgy
159		Nonmetallic minerals
160		Building and ornamental stones
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