查询词典 noble gas

In this paper, hazard theory is combined with coal mine gas accident and coal mine hazard is put forward, analyzing gas accident hazard by the three class of hazard.

本文将危险源理论和煤矿瓦斯事故相结合，提出煤矿危险源这一全新概念，用三类危险源思想来分析瓦斯事故危险源。

Determination of vapour content in chlorine gas is very important in chlor-alkali production,and determination accuracy is considerably influenced by a certain amount of sulfuric acid mist in chlorine gas.

气氯中水分的测定在氯碱生产中是非常重要的，但气氯中含有微量硫酸酸雾对测量的精度有一定的影响，文中较为系统地叙述了测定气氯中硫酸酸雾的原理和过程，具有一定的指导性。

DGS-B glass reinforced plastics is acerbity mist purify a tower one, overview DGS-B glass reinforced plastics is acerbity mist purifying a tower is our company combine me according to equipment of foreign off-gas treatment the equipment of new generation off-gas treatment that company acid mist handles a tower to improve.

DGS-B型玻璃钢酸雾过滤塔一、概述DGS-B型玻璃钢酸雾过滤塔是本企业依据海外污气安排配置联系我企业酸雾安排塔改善的新一代污气安排配置。

The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.

通过研究，获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量，并由此得到了反应的势能面图，在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。

As a multi-national oil and gas exploration and development company, Addax Petroleum in West Africa and the Middle East have oil and gas assets.

作为一家跨国油气勘探开发公司，Addax石油公司在西非和中东拥有油气资产。

The influence of Na2CO3 as additive to the process is the combined effect of the production of active species and the removal of HNCO produced by the decomposition of urea, but it also caused the flue gas became alkaline gas.

Na2CO3作添加剂对工艺的影响是产生活性基元和去除尿素分解生成的HNCO联合作用造成的，但会引起烟气变为碱性。

An engine cyclic variation model has been built by using the residual gas temperature for the n-th cycle as the input of the model, through constant pressure intake process, adiabatic compression process, constant volume combustion process, adiabatic expansion process, adiabatic blow down process and constant pressure exhaust process to approximate the thermodynamic processes in the cylinder, finally the residual gas temperature for the (n+1)-th cycle can be estimated.

基于循环间变动的排气温度建立了一个发动机循环变动模型。在这个模型中，第n个循环的排气温度作为模型的输入，通过定压进气过程、绝热压缩过程、定容燃烧过程、绝热膨胀过程、定容放热过程和定压排气过程来近似汽缸内的热力学过程，最后得出第n+1个循环的排气温度。

Annual operating companies adipate project objective is to pass the second quarter of output products, gas pipeline projects simultaneously to major petrochemical and gas production facilities to achieve safe production, is expected to achieve the main business income of 680 million yuan.

公司2009年度经营目标是己二酸项目二季度产出合格产品、输气管道项目同步向大石化供气以及各生产装置实现安全生产，预计将实现主营业务收入6.8亿元。

Also by earnestly studing and investigating in practice, some orginal devices and expresimental methods have been improved on; for : the progress of the gas admeasurement in the gas explosion,and the betterment of the explosion suppression equipments.

同时在实践中认真探索和钻研，对原有的一些设备和实验方法进行了改进，如：气体爆炸实验中配气方法的改进、爆炸抑制装置的改进等。

This paper introduces some solutions :change cast-iron pipe to steel or PE pipe ;retain manufactured gas works to adulterate ;on humidification of natural gas in network .

文章介绍了国内燃气铸铁管网改造的常用方法，并对其各自特点进行了分析。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。