Room airengineering systems for kitchens shall be operated only by outside air.
厨房的室内空气工程系统只可以在有室外空气时操作。
2
In this paper analyses are conducted on hidden factors existed in the LPG mixed airengineering and some corresponding measures and safety critical conditions are also put forward.
对LPG混空气工程存在的危险因素进行分析，并提出了有针对性的措施及安全边界条件。
3
The company will provide engineering, research, and program management services for the Air Force Technical Applications Center (AFTAC) at Patrick Air Force Base.