ceilings锅炉炉顶ceilingn.天花板；上限Ceiling and Visibility Unlimited天气晴朗ceiling sound transmission class吊顶传声等级ceiling suspended image intensifier天轨悬吊影像增强器ceiling temperature in polymerization聚合最高温度Ceiling exposed split air conditioner天花板式分体空调器ceiling of international payments capacity国际收支最高额ceiling supported shadowless operating lamp悬式无影(手术)灯ceiling-mounted cassette type indoor unit嵌入式空调室内机ceiling of internationalv payments capacity国际收支最高额ceiling temperature of polymerization temperature聚合最高温