has also commissioned six Aerobridges, two Baggage Handling Conveyor systems, two Fire Alarm Smoke Detection Systems, 50 floodlights, two 500 tons air-conditioning plants together with 12 additional air-conditioning zone cabinets, two packaged air-conditioning units, and an extension M.V. switchboard for additional domestic power and lighting.
Lion Rock Tunnel
8.35. The Lion Rock Tunnel Electrical and Mechanical Services Section maintains the electrical and electronic equipment connected with the toll booths, the tunnel lighting, carbon monoxide monitoring equipment, smoke-detection units, ventilation plants and 'no-break' generator sets. 367 repairs were carried out and 1,427 tunnel lights replaced. In addition, the southern and northern lane marker beacon flashing circuits were modified, temporary emergency supply wiring to the tunnel lighting control consoles in the control room installed, three visibility indication and alarm equipment for double decker buses were resited and the modification to the C.O. Analyser Lira Unit completed.
Hospital Services
8.36. The Hospital Services Section operates and maintains the electrical and mechanical services of all Government and Military Hospitals. These services have been maintained throughout the year with no unscheduled stoppages and no major breakdown of plant and equipment. As the Queen Mary Hospital Complex has been enlarged by extensions and by the addition of new buildings, there has been a commensurate increase in the demands for steam and hot water. To meet these demands, two old steam boilers and two old hot-water boilers have been replaced by one large new steam boiler and three new steam calorifiers, all more efficient and of modern design. Responsibility for the operation and maintenance of additional air-conditioning plant, installed to serve these new sections, was also taken over. During March 1971, the section assumed responsibility for the operation and maintenance of the services in the new 7-storey David Trench Rehabilitation Centre including two oil-fired water heaters, air-conditioning plant and two large air-compressor units. On Kowloon side, the commitments of the Section have been similarly increased owing to the completion of the New 600-bed Convalescent Block at Kowloon Hospital, with an oil-fired steam boiler, two gas-fired incinerators, a 250 KVA stand-by alternator and dual 50-ton air-conditioning plants. At Queen Elizabeth Hospital responsibility for servicing and
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