如果工作区域的油气浓度比最低爆炸浓度高出5%，必须使用呼吸器。
You must use a respirator if the fuel-gas concentration in the work area is 5% more than the lower explosive limit (LEL).
通过分析氨气扩散后爆炸浓度下限范围，探讨了如何设置警戒区的方法。
According to the range of lower explosive concentration limit, methods for how to set up warning region were research.
结果表明，在分析可燃气体泄漏的危险性时，不仅应分析环境空间可燃气体的爆炸浓度范围，而且也要注意存在局部着火的可能性。
The results indicate that when flammable gas risk is analyzed, both the flammable gas explosion scopes in the environment space and local fire possibility should be paid attention to.
高浓度甲烷增加了后续发生爆炸的危险性，也对救援工作造成了妨碍。
High levels of methane gas have raised fears of further explosions and hindered rescue efforts.
想要将浓度20%的铀浓缩至爆炸所需大约90%的浓度比最初(移后)浓缩至最初3.5%要简单很多。
Getting uranium from 20% enriched to the 90% or so needed for a bomb takes a lot less effort than getting (uranium from 20%) to the original 3.5% in the first place.
想要将浓度20%的铀浓缩至爆炸所需大约90%的浓度比最初浓缩至3.5%要简单很多。
Getting uranium from 20% enriched to the 90% or so needed for a bomb takes a lot less effort than getting to the original 3.5% in the first place.
最大爆炸压力和最大压力上升速率随粉尘浓度的增加而线性增加。
And the maximum explosion pressure and maximum rate of pressure rise vary approximately linearly with the concentration.
当空气中甲烷浓度超过百分之五的时候就会爆炸。
It explodes at concentrations in the air of as little as 5 percent.
对于球形密闭容器内气云的爆炸过程，压力、速度、密度、温度、浓度等流场参数均随时间、空间而发生变化。
For explosion process of gas cloud in closed vessels, flow field parameters, such as pressure, velocity, density, temperature, concentration and so on, vary with time and space.
在一定程度上，随着泡沫铝厚度、油气浓度（即爆炸荷载大小）的增加，降低板中心点处位移峰值的幅度也随之增加。
The decrease gradient of the peak displacement at the center of plate increases as the foam thickness, fuel-air concentration(i. e. explosion load size) increases to some extent.
通过实验，对煤矿井下存在的多元混合气体的爆炸极限和临界氧浓度进行了分析和研究。
The paper experimentally studied the explosive limit and the critical oxygen concentration of several kinds of gases that are found in the mine.
气体的LEL是指用火源使空气中的该气体爆炸的最低气体浓度。
The LEL of a gas is the minimum concentration of that gas in air at which an ignition source will cause an explosion.
分别推导出粉尘爆炸放热量和最大爆炸压力与煤尘浓度、甲烷浓度等影响因素的关系。
The relations between the maximum explosion pressure, the maximum quantity of draw-off heat and coal dust concentration, methane concentration were calculated.
汽油的油蒸汽挥发达到一定浓度极限，正好与拨打、接听过程中出现的火花极易引起爆炸。
Gasoline vapor volatile developed to a certain concentration limit, just with the call, answer the process of sparking easily cause explosion.
研究水煤气与空气混合时煤气的爆炸极限与所含各组分浓度之间的关系；
The relationship between the gas explosive limits and concentrations was studied as air was mixed with water gas.
由于气化速率的升高，污染物在空气中的浓度也会变高，从而更容易发生爆炸。
The evaporation rate is higher and the concentration of pollutants in the air increases with more risks of explosion.
同时指出参与爆炸的瓦斯量、瓦斯气体浓度和火源个数及分布位置对瓦斯爆炸传播有重大影响。
In the meantime, the concentration of the combustible gas and the number and distributive location of fire source have influence on the gas explosion propagation seriously.
考虑到氢气易燃，本文采用光纤作为敏感探头元件，在氢气环境下测试低于爆炸极限的氢气浓度。
Taking the flammability of hydrogen into account, in this paper, optical fiber is used as a sensing probe in hydrogen environment to test the hydrogen concentration which is below the explosive limit.
采用它判别瓦斯与空气混合气体的爆炸危险性时，比用瓦斯浓度三角形更加全面、准确。
Using this chart to distinguish the explosion danger caused by the mixture of gas and air is more complete and accurate than the chart of gas detonation triangle.
本实用新型提供一种在不损害管道情况下，可有效防止爆炸的低浓度燃气输送管道。
The utility model provides the delivery duct for low concentration gas, which can effectively prevent explosion without damaging the duct.
粉尘浓度和湍流速度对粉尘爆炸猛烈程度和粉尘云最小着火能的测试有很大影响。
The dust concentration and velocity of turbulence have significant effects on the level of explosion and measurement of the minimum ignition energy of dust clouds.
爆炸时的临界氧浓度，则需用另一种三角形图示法予以确定。
Critical oxygen concentration for explosion is decided by a new triangle illustration method.
瓦斯爆炸事故频繁发生，对瓦斯浓度进行准确、实时检测和预警是治理瓦斯危害的有效手段。
Methane explosion accidents occur frequently, and accurate and real-time detection and early warning of methane concentration are the effective means of preventing these accidents.
此预测模型可以应用到几何成比例、浓度相同、不同体积的矿井瓦斯-空气混合气体爆炸超压预测。
The model could also be used to the mine gas explosion experiments with the same geometry, the same concentration and different volume.
本文建立了离子色谱-抑制电导检测测定含有高浓度硝酸根的爆炸尘土中残留氯酸根的方法。
An ion chromatography method with suppression-conductivity detection has been developed for the detection of residuary chlorate in the soil after explosion with a high concentration of nitrate.
这是在丙酮蒸汽爆炸下限浓度左右的一个重要浓度范围。
This is an important range which is at about the concentration of the lowest explode limit of acetone vapor.
当煤矿井下发生爆炸时会产生一定体积、温度、浓度及密度的毒害烟流。
Poisonous and harmful smoke flow with a certain volume, temperature, concentration and density will be generated during explosion in a coal mine.
探索了浓度爆炸极限、爆炸形态与波形及其影响因素；
The explosive limits of concentration, explosive morphology, explosive waveforms and their influence factors were investigated.
探索了浓度爆炸极限、爆炸形态与波形及其影响因素；
The explosive limits of concentration, explosive morphology, explosive waveforms and their influence factors were investigated.
应用推荐