您要查找的是不是：
- Back Exhaust Air Device: It can prevent the air reversing in the common exhaust gas pipeline of kitchen and toilet. 止回排风装置：止回排风系统能够有效减少厨房间、卫生间公用排气管道内的气体产生反风；
- In this paper, the functional requirements and implementation method for air reversing, anti -surge, structural design and monitoring alarm system for working condition in metro fan are summarized. 总结了地铁风机的反风、防喘振、结构设计及工作状态监测报警系统的功能要求和实现方法,提高了风机可靠性和安全性。
- Main Products: Hand tools, Air Sander, Air Hammer, Air Ratchet, Air Die Grinder, Air Cut-off Tool, Air Impact Wrench, Air Reversible Drill. 主要产品：手动工具，砂布机，气锤，棘轮扳手，直型砂轮机，切割机，风扳，气锤。
- Keywords air reversing;rule of gas effusing;gas consistency; 反风;瓦斯涌出规律;瓦斯浓度;
- The air in the garden was warm and fragrant. 花园里的空气一片温馨。
- The archers sent their shafts through the air. 弓箭手向空中射出利箭。
- Keywords spontaneousness wind pressure;air reversing;ventilation system; 自然风压;风流反向;通风系统;
- The lack of air in the room make everyone sniffle. 屋子里空气缺乏，使得每个人都频频吸气。
- During the intermission, let's go out for some fresh air. 幕间休息时，我们出去呼吸呼吸新鲜空气吧。
- The air held a foretaste of a storm. 天气有要括大风的迹象。
- The air was reeking with the smell of tobacco. 空气中弥漫着烟草的气味。
- A walk in the fresh air will pep me up. 我在空气新鲜的地方散步就感到精神饱满。
- He served one month with the Air Army in Kuwait. 他在科威特的空军里服役1个月。
- Large air and navel forces were set into action. 庞大的空军和海军部队开始行动了。
- His modesty [air of joviality] was all put on. 他的谦逊[愉快的样子]都是装出来的。
- Ida was choking with the dry air. 空气干燥，艾达感到喘不过气来。
- His vibrant voice commove the air. 他响亮的声音振动了空气。
- Fresh air and exercise are good for the health. 新鲜空气和运动有益于健康。
- I shall travel to New York by air this weekend. 这个周末我将要乘飞机去纽约旅行。
