共 50 条
- [31] CONTROL-SYSTEM RETROFIT REDUCES POWER-PLANTS OPERATING COSTS I&CS-CONTROL TECHNOLOGY FOR ENGINEERS AND ENGINEERING MANAGEMENT, 1989, 62 (11): : 83 - 84
- [36] Sanitary district reduces odors, maintenance and operating costs WATER-ENGINEERING & MANAGEMENT, 1997, 144 (04): : 20 - 21
- [39] Sanitary district reduces odors, maintenance and operating costs Water Engineering and Management, 1997, 144 (04): : 20 - 21
- [40] ANIMAL CARE FACILITY REDUCES OPERATING AND MAINTENANCE COSTS ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND AIR-CONDITIONING ENGINEERS, 1991, 33 (03): : 26 - 28