young cheerful construction worker with large spirit level in his hands on to construction ladder at construction site. - 出風口 個照片及圖片檔商務, 冷氣, 工業
engineers or technicians working extensive metal piping, hvac systems, industrial equipment suggesting a controlled, well-maintained environment concept. - 出風口 個照片及圖片檔技術, 職業
home office interior with air conditioner, table, desktop computer and wooden cabinet - 出風口 個照片及圖片檔辦公室, 冷氣, 住宅內部
bare ceiling with air duct, cctv, air conditioner pipe and fire sprinkler system on white ceiling wall. air flow and ventilation system. ceiling lamp light with opened light. interior architecture. - 出風口 個照片及圖片檔商務, 工業, 修理
