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In order to reduce the natural aging time of 2024 aluminum alloy, a new artificial aging technique of 2024 which aging time is shorter than that of the natural aging technique, based on the hardness and conductivity test and aging principle analysis, was proposed in this paper.

高立柱 ，刘艳红，田秀云为缩短2024铝合金的自然时效时间，本文通过对2024铝合金导电率和硬度实验研究以及对它的时效机理的分析，初步确定了2024铝合金的一种新的时效时间较短的人工时效制度。

To improve the purple soil storage capacity, to prevent soil erosion in hunan province, the choice of HengYangXian 20o purple soil slope, setting Guan waste land, grassland, natural forest and grassland and agrimony slight composite 4 processing, the water treatment performance and its mechanism, and the results show that, compared to the purple soil LuoDe HuangShanPo ground implement agrimony and three-dimensional planting trees for 1-2 years later, reduce soil bulk density 0.10 g/cm3 0.09 ~, soil porosity, permeability of soil moisture 14.01% increase rate increase 2.20 ~ 2.29 times.

为提高紫色土蓄水能力，防止水土流失，在湖南省衡阳县选择20o 左右的紫色土荒山坡地，设置祼地、自然草地、龙须草地和龙须草与林地复合4 个处理，比较分析各处理贮水性能及其改良机理。结果表明，与裸地相比，在紫色土荒山坡地上实行龙须草与林木立体种植1～2 年后，土壤容重降低0.09～0.10g/cm3，土壤总孔隙度增加14.01%，土壤水分渗透速率提高2.20～2.29 倍。

PX could reduce AHR induced by acute or chronic smoking.

PX能降低由急、慢性吸烟所引起的气道高反应。

AIP is designed for end-user bearing customers that are looking for a value-added service that helps them to improve reliability, reduce operating costs and improve efficiency and profitability.

的AIP是专为最终用户的轴承客户，正在寻找增值服务，帮助他们提高可靠性，降低运营成本，提高效率和盈利能力。

The committee decided that measures should be taken immediately to reduce air pollution near that petrochemical base.

委员会决定应该立即采取措施减少那个石油化工基地附近的空气污染现象。

Cooling Air – Keeping a brake system in the flow of air for cooling can also help reduce operating temperatures.

冷却风——将刹车系统置于流动的空气中以降温也可以帮助降低工作温度。

Furthermore, a improving design method of cell's air exhaust duct is presented to reduce the resistance change, and a new way is contrived up to regulate the valves in the cells'exit.

在此基础上，对电解槽排烟管道的设计和调节方法进行了改进，使由于电解槽加工而引起的失调降到了最低。

Well-designed air curtain system can make use of cool air effectively, reduce the infiltrated air and save the energy.

超市中开式陈列柜风幕的卷吸作用是陈列柜热负荷的主要来源，良好的风幕系统可以提高冷空气的利用率，减少热负荷，达到节约能源的目的。

Clean work surface allows the installation of air duct save time and reduce trouble.

洁净的工作表面可使风管的安装节省时间并减少麻烦。

The authors suggest that superior vena cava and right atrium retrograde perfusion can remove most air embolism in the blood vessels of the brain and heart to reduce/relief the injuries of them and prevent occurrence of serious low cardiac output.

这对解除或减轻中枢神经系统和心肌损伤、防止严重低心排综合征的发生、增加心脑复苏机会十分重要。

We have limited budget let me know if you can do this competitively.

我们有限的预算让我知道如果你能做到这一点竞争力。

We don't know how other critters breathe--lizards, for example.

我们还不知道诸如蜥蜴之类的动物如何呼吸。