As a key to tunnel smoke control, the critical velocity refers to a minimum vertical ventilation velocity which can effectively control the smoke under the direction of fire source without reversing.
临界风速是隧道烟气控制的关键所在，其指隧道火灾过程中能有效控制烟气于火源下风方向而不发生逆流的最小纵向通风风速。
In case of fire, please follow the direction of arrow and take the nearest staircase.
如发生火警，可按箭头指示方向，选择最近的楼梯逃生。
The calculate method and its results would provide theory gist of tunnel fire fighting design, the establishment of the escape direction system and the emergency scheme.
其方法和结论可为特长隧道消防系统的设计、紧急疏散方案和引导指挥体系的建立提供理论依据。
Ships play very differently from land units: they have to be manoeuvred with the wind in mind, they fire massive broadsides at right angles to their direction of movement.
船舶的指挥不同于地面单位：他们必须学会操纵风向，他们沿射击的宽边成直角方向移动。
Directed at fire prevention in goaf, the paper proposes a method of injecting nitrogen and controlling nitrogen air to flow direction using fugitive air and controlling air quantity in gob.
为解决采空区防火问题，提出从采空区漏入风一侧顺流注氮，充分利用采空区漏风流向控制氮气的流向并控制漏风量的注氮思路。
It is of a guiding significance for forest fire forecast, fire fighting direction, use of fire, biological fireproofing and some other aspects.
它对林火预报、可燃物管理、灭火指挥、营林用火、生物防火等方面有重要的指导意义。
To improve the directivity and gain, the four units of plate end-fire antennas are arranged in the direction of end-fire.
为了提高增益和方向性，把四个平板端射天线单元在端射方向上排列。
The distributed intelligent fire alarm system can overcome the flaw of traditional passive fire alarm system. At present it is the main direction of fir...
分布式智能报警系统可克服传统的被动型报警系统的弊端，系目前国内外主要研究方向。
The distributed intelligent fire alarm system can overcome the flaw of traditional passive fire alarm system. At present it is the main direction of fir...
分布式智能报警系统可克服传统的被动型报警系统的弊端，系目前国内外主要研究方向。
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