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With the raise of a calculation method on dynamic friction coefficient of downhole tubing, the calculating accuracy of vertical conduit flow pressure is strengthened for a gas well, which promotes the dynamic analysis and prediction on gas well production.

气井井下油管动态摩阻系数计算方法的提出，提高了气井垂管流动压力计算的精度，对气井生产动态分析和预测起到了很好的推动作用。

So the first method is the best one, which makes use of the temperature discrepancy between brick and flue gas during initial stage of combustion to intensify burning by excess coefficient of maximum coal gas against minimum air, so that the temperature at top of arch can reach the highest specified value 1350℃ in 15-30mins.

因此较优的燃烧制度是固定煤气量调节空气的快速烧炉法，即燃烧初期利用砖温与烟气温度相差较大的时机，以最大煤气量和最小空气过剩系数来强化燃烧，尽快在15～30min内将拱顶温度烧到规定的最高值1350℃。

The degeneration conditions for quantum gas system were analyzed based on statistical mechanics method. We point out the coincidence among these methods and the dependent properties of quantum gas system to its degeneration by comparing and analyzing these methods.

基于统计力学方法，从几种不同角度讨论了量子气体系统的简并条件，并通过分析和对比，指出它们本质上的一致性以及量子气体的性质对于其简并度的依赖关系。

The polyimide coition gas membrane can effectively get rid of acid gas of H2S by changing craftwork condition.

结论］聚酰亚胺致密气体膜通过改变工艺条件可有效脱除H2S酸气。

Gas diffusion layer is one of the most important components in proton exchange membrane fuel cell. The contact resistance between current collector and gas diffusion layer is an important part of the total resistance of fuel cell and is also a key factor led to the power loss of PEMFC.

气体扩散层是质子交换膜燃料电池的重要组件，其与极板之间的接触电阻是燃料电池内阻的重要组成部分，也是导致燃料电池功率损失的重要因素。

In process of gas injection and withdraw, natural gas is compressed and swelled...

在气库的注采过程中，天然气的不断压缩和膨胀并在井筒和地层中产生热交换，引起井筒和溶腔内的温度和压力变化。

The first is that it contains a large volume of gas at a relatively low pressure compared to a compressed gas cylinder.

第一个是，同压缩气体钢瓶相比它能够在相对低的压力下容纳大量的气体。

Engines using compressed natural gas, liquified petroleum gas and other alternative fuels

使用压缩天然气、液化石油气和其他代用燃料的发动机

There is a growing realization that the only effective way to achieve further reductions in vehicle emissions—short of a massive shift away from the private automobile—is to replace conventional diesel fuel and gasoline with cleaner-burning fuels such as compressed natural gas, liquefied petroleum gas, ethanol, or methanol.

H 人们逐渐认识到，唯一有效的方法来进一步减少车辆尾气的排放量——除了大规模减少私人汽车——替换传统的柴油和汽油，用燃烧得更加清洁的燃料，比如说压缩天然气、液化石油气、乙醇、或者甲醇。

Third, to further reduce the road tax for three (3) years for private vehicle owners who choose to convert to Compressed Natural Gas or Liquified Petroleum Gas, as well as increasing supply of CNG and LPG in all petrol stations and breaking the monopoly by Petronas.

第三，进一步为要转换为压缩天然气或液化石油气的私家车主一连三年降低路税。同时，在所有油站增加供应天然气和液化石油气，并不仅是被国家石油公司所垄断。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。