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- [28] SURFACE AERATION CUTS COSTS OF WASTE-WATER TREATMENT PLANT CIVIL ENGINEERING, 1971, 41 (08): : 41 - &
- [29] Mobile unit cuts sludge dewatering costs for rural water authority WATER-ENGINEERING & MANAGEMENT, 1997, 144 (12): : 12 - 12
- [30] CLEVER USE OF COOLING WATER CUTS ENERGY COSTS FOR CANADIAN STAMPER METAL STAMPING, 1976, 10 (01): : 14 - 15