常压

The different kinds and contents of high aromaticity cycle oils,HCO and LCO,were employed as additives during hydrodemetallation of atmosphere residue,and their effects on performance of AR HDM were studied.

以不同种类和不同含量高芳香性的催化裂化产物重循环油和轻循环油作为添加剂，考察了其对常压渣油加氢脱金属反应性能的影响。

This new refining process is termed "ladle-refining" or "secondary steelmaking". It is discussed in three parts: The development of various ladle-refining process including vacuum refining and normal pressure refining such as synthetic slag treatment, argon stirring, vacuum degassing VC, SLD,...

本文分三个方面进行讨论：(1)各种炉外精炼法的发展，包括真空精炼和常压精炼，例如合成渣洗、吹氩搅拌(Gazal、CAB、SAB法)、真空脱气(VC、SLD、TD、TD-VC、TD-SLD、RH、DH、FinKl和Gazid法)、带电弧加热的炉外精炼(ASEA-SKF、FinKl-VAD和LF法)、喷射冶金以及不锈钢的精炼法(AOD、CLU、VOD、SS-VOD、KVOD/VAD、RH-OB和VODC法)，(2)我国炉外精炼技术的现状，(3)发展炉外精炼必须注意的一些问题。

The compound tray holds excellent features , it has been successfully used in industry namely , methane alcohol ethanol , methyl aeetyl distillations and etc It is also expected to have a broad prospect for applications in other chemical industry field In this paper , many studies are concerned with the gas liquid duallowing the hole and oscillating regulation of the compound tray by experiments These studies will provide theoretical and experimental foundation for the design and improvement of the compound tray The main part of which is a 500 mm inner diameter three compound trays column , serving as a hydrodynamic model , the system air ?

复合塔板以其优良的性能，在甲醇、乙醇和丙酮等生产精馏装置中获得了成功的应用，并在其它化工生产领域有着广泛的应用前景。本论文旨在通过实验研究复合塔板上气液穿孔流动及波动波动规律，为复合塔的设计和结构改进提供理论和实验依据。实验是在一塔径500mm的冷模塔内，以空气—水为物系，在常压下进行实验。

By plasma polymrization and dynamic ion - beam mixed implantation methods, polyhexafluoropropene film and polytetra fluoroethylene film are prepared respectively. These films are coated on the external surfaces of brass and red copper tubes.

分别采用等离子体聚合技术和离子束动态混合注入技术在黄铜管和紫铜管表面制备了超薄聚六氟丙烯及四氟乙烯聚合物表面，实现了水蒸汽在常压下的滴状冷凝。

The activity of the prepared catalyst was investigated by degradation of methyl orange artificial wastewater by microwave induced oxidation process.

微波诱导氧化技术是近年来发展起来的一种新型的可在常温常压下氧化或解降有机物的方法。

A new catalyst Ni K/NaX for the synthesis of methyl isobutyl ketone from acetone and hydrogen in one step at atmospheric pressure has been prepared.

利用化学浸渍法制备了系列Ni－ K／NaX复合型催化剂，用于常压下催化丙酮一步法合成甲基异丁基酮，考察了催化剂组成及反应条件对反应性能的影响。

The dehydrogenation of vapor phase methyl isobutyl carbinol to produce methyl isobutyl ketone over a CuO-ZnO-Al2O3 catalyst prepared by co-precipitation method under the atmospheric pressure was studied.

采用共沉淀法制备的铜系CuO/ZnO/Al_2O_3脱氢催化剂，在常压下进行了甲基异丁基甲醇的气相脱氢制备甲基异丁基酮的反应实验。

It is hard to prepare high quality magnesium hydroxide by hydration of magnesium oxide at atmosphere and is easy at hydrothermal condition.

氧化镁水化制备高质量氢氧化镁常压下不可行，而在水热条件下则可以。

In this paper ,gray relational analysis was applied to study of the relation between the dry point of petrol in distillation processing under ordinary pressure from Nanchong oil refinery and factors.

用灰色关联法取代传统的数理统计方法，对炼油厂常压蒸馏工段汽油干点值影响因素之间的关系进行研究，确定各影响因子之间的主次关系。

The entrainment coefficient decreases with the increase of the downwash flow.

实验中主喷管气流温度610℃，压力为常压，下洗气流温度为常温，速度范围为

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。