下午3点30，刚刚在东京电力公司宣布排气之后，一号反应堆发生爆炸，起因是堆芯产生的大量氢气。
At around 3:30 p.m., shortly after TEPCO announced the venting, an explosion rocked reactor number 1. This is thought to have been caused by hydrogen from the core.
高位点的排气口和低位点的排水口是用于系统完全的充填和排水。
High point vents and low point drains are desirable for complete filling and draining of systems.
在分配系统中没有安装高位点的排气口，可采用高流速以及流速限制技术以确保系统的完全充填。
In distribution systems where high point vents are not installed, high velocity flow and flow restriction techniques can be used to ensure complete filling of the system.
声压级在相交激波点附近出现剧烈变化，喷管出口处的激波和排气羽流造成强噪声。
The sound pressure level changes acutely in shock intersection, and shocks outside nozzle and exhaust plume cause strong noise.
当活塞再一次到达下止点时，排气门打开。
当活塞再一次到达下止点时，排气门打开。
在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。
In the two-cycle engine, the piston ACTS as a valve, clearing valve ports in the cylinder wall as it nears BDC.
研究分析表明：尾气采样探头伸入排气尾管的长度及取样点前的测量管路密封性是保证测量结果正确性的主要因素。
The result shows that the length of the sampling pipe inserted into the vent-pipe and the vent-pipe's airproof are the key factors for the correct exhaust emissions results.
这种点源分析方法考虑了排气气体和喷管的特性。
A source flow model incorporate with the characteristics of the exhaust gas and the nozzle is used in the analysis.
排气冲程随着活塞经过下止点并上行至上止点。
The exhaust stroke continues as the piston passes BDC and moves upward to past TDC.
排气冲程随着活塞经过下止点并上行至上止点。
The exhaust stroke continues as the piston passes BDC and moves upward to past TDC.
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