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ลำดับที่	LC	คำอธิบาย
61		Environmental effects of industries and plants
62		Water supply for domestic and industrial purposes
63		Water pollution
64		Water purification. Water treatment and conditioning. Saline water conversion
65		Water distribution systems
66		Sewage collection and disposal systems. Sewerage
67		Municipal refuse. Solid wastes
68		Street cleaning. Litter and its removal
69		Special types of environment Including soil pollution, air pollution, noise pollution
70		Industrial and factory sanitation
71		Industrial and factory wastes
72		Rural and farm sanitary engineering
73		Low temperature sanitary engineering
74		Highway engineering. Roads and pavements
75		Highway design. Interchanges and intersections
76		Roadside development. Landscaping
77		Materials for roadmaking
78		Location engineering
79		Construction details Including foundations, maintenance, equipment
80		Pavements and paved roads
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