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SEWAGE WORKS |
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| UF |
Sewage Treatment Works |
| SN | A group of buildings in which local sewage is filtered and purified in large rectangular or circular tanks. |
| CL |
WATER SUPPLY AND DRAINAGE |
| BT | WATER DISPOSAL SITE |
| RT |
FILTER BED
FILTER HOUSE SCREENS HOUSE SEPTIC TANK SEWAGE FARM SEWAGE PUMPING STATION SEWER
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