Based on the analysis of the variation law of smoke flow in subway platform fire, a concept about critical ventilation speed from platform to concourse was presented.
在分析了地铁站台火灾时烟气流场变化规律的基础上，提出了临界通风速度的概念。
Therefore, for aerial platform fire truck, accurate analysis on boom's strength and rigidity, compact and durable design would be of great significance to improve reliability and reduce cost.
对臂架结构的强度刚度进行准确分析，设计出轻便、耐用的臂架对提高云梯消防车工作可靠性、降低成本具有十分重要的意义。
Therefore, for aerial platform fire truck, accurate analysis on boom's strength and rigidity, compact and durable design would be of great significance to improve reliability and reduce cost.
对臂架结构的强度刚度进行准确分析，设计出轻便、耐用的臂架对提高云梯消防车工作可靠性、降低成本具有十分重要的意义。
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