气环

在一个活塞气环槽内设有上下二片活塞环，二片活塞环上的开口相互错开。

Upper and lower piston rings are arranged inside a piston gaseous ring groove , and openings on the two-piece piston rings are mutually staggered .

低压配气环网调峰压力的计算

Calculation on peak pressure of low pressure distribution loop network

事实上有两种活塞环，气环和油环。

Actually , there are two types of rings , compression rings and oil-control rings .

他们知道行星是由围绕太阳旋转的巨大的气环和尘环变化而成。

They knew the planets formed from a huge ring of gas and dust turning around the sun .

最顶的两道保证活塞与气缸壁间密封的环叫做气环。

The top two rings are to keep the gases in the cylinder and are called compression rings .

结果表明，采用一个气环后的摩擦功耗有大幅度降低。

The results show that there are more reduction of frictional power consumption in one compress ring than two .

结论新月征、气环征以及球形病灶随体位改变可作为肺曲菌球的影像学特征。

Conclusion A mobile intracavitary mass with air crescent sign or air ring sign is the imaging characteristics of pulmonary aspergilloma .

当可燃混合气压缩时，气环密封可燃混合气；当可燃混合气燃烧时气环可阻止所产生的压力不外溢。

The compression rings seal in the air-fuel mixture as it is compressed and also the combustion pressures as the mixture Burns .

而利用巧妙环组作气环，是可以降低机油消耗量和活塞漏气量的。

However , ingeniously making use of ring group as air ring will reduce oil consumption as well as air leak of piston .

根据当今内燃机产品发展中面临的问题和需求，提出了活塞环组中的两个气环改为一个气环的新结构。

A new structure design of adopting a compress ring was put forward according to the problems and requirements faced to development of internal combustion engine now .

股骨头内出现囊状软组织密度影，出现新月征；（2）空洞（空腔）内可动性肿块影伴新月征或气环征是肺曲菌球的影像学特征。

Cystic low-density areas ; ② Cavity associated with mobile mass inside presented as air meniscus or air sing sign were the imaging characteristics of pulmonary aspergilloma .

高质量的一个气环，能够完成现有两环的密封润滑功能，这样的结构设计新方法有助于推进内燃机的轻量化。

The one compress ring of high quality can perform the function of seal and lubrication of two rings . The new method of structure design will help to push the lightweight process of internal combustion engine .

压缩机用气润滑环式密封双转向U形槽的结构特点和性能

Non contacting gas lubricated face seals . Design features and characteristics of the bidirectional U groove

输气管线环焊接头抗HIC性能研究

Research on HIC Resistance Property of Girth Welding Joints on Gas Transmission Pipeline

丙烯和双氧水在TS-1上气固相环氧化反应气相二氧化硅对环氧富锌涂料性能的改性研究

Gas-Phase Epoxidation of Propylene with Hydrogen Peroxide over Titanium Silicalite Catalyst Study on the Property of Aerosil in Epoxy Oxygen and Rich Zinc Coating

天然气单环芳烃含量丰富，苯＋甲苯占C6～C7族组成的15%～50%；

Abundant monocyclic aromatics , the benzene and toluene accounting for 15 % ~ 50 % of the C 6 ~ C 7 group composition ;

本论文中，我们采用沉积沉淀法制备了Au/TS-1催化剂，并对载体TS-1进行改性以及在制备催化剂过程中尝试添加助剂，考察了改性催化剂的丙烯直接气相环氧化的催化性能。

In this thesis , Au / TS-1 catalysts were prepared by a deposition-precipitation method and tested for direct propylene epoxidation . Modification of the TS-1 support and promotion of catalysts in the preparation process were carried out and their effects on the catalytic performance was investigated .

油气管道环焊接头断裂性能的不均匀性分析

Non-Uniformity Analysis on Oil and Gas Pipeline circumference Jointer Fracture Property

微乳技术制备Ag/TS-1催化剂及丙烯气相环氧化

Gas-phase Propylene Epoxidation over Ag / TS-1 Prepared in Microemulsion

液化石油气钢瓶环缝锁底接头埋弧自动焊

Automatic Submerged Arc Welding Technology for Girth Weld of LPG Cylinder with Lock Butt Joint

油气管道环焊缝防腐涂装技术研究

Research on Technologies of Corrosion-resist Coating on Girth Welds of the Oil and Gas Pipeline

城市天然气高压环网储气能力研究

A Study of Gas Storage Capability about High Pressure Ring Natural Gas Pipeline Networks in Cites

本文介绍了液化石油气钢瓶环缝锁底接头、两道埋弧焊工艺。

Two passes ASAW technology for girth weld of LPG cylinder with lock butt joint is introduced .

气幕环阻力性能船模试验研究

Experimental Study on Resistance Performance of Ship Model with Bubble-Screen System When you want have a loop

输气管线环焊缝焊接工艺研究

Study on Welding Process of Girth Weld for Transportation Gas Pipeline When you want have a loop

Ag/TS-1催化剂的制备、表征及其丙烯气相环氧化性能的研究

Preparation , Characterization of Ag / TS-1 Catalyst and Its Catalytic Properties on the Gas-Phase Epoxidation of Propylene

氢氧等离子体法直接合成过氧化氢及其在丙烯气相环氧化中的应用事实上还不知道芳香族化合物的直接烷氧基化的方法。

Direct Synthesis of Hydrogen Peroxide via Hydrogen-Oxygen Plasma and Its Use in the Gas-Phase Epoxidation of Propylene ; Direct alkoxylation of aromatic compounds is virtually unknown .

考察了在Ba-Cs-Cl-Ag/α-Al2O3上以空气为氧化剂的丁二烯气相环氧化反应条件对催化剂性能的影响。

Using air as oxidant , the effects of reaction conditions on performance of Ba , Cs , Cl promoted Ag / α - Al2O3 catalysts for butadiene epoxidation were examined .

采用双微乳技术制备的Ag/TS-1在100℃即对丙烯气相环氧化表现出良好的催化活性。

We come to the following conclusion : 1 . Ag / TS-1 prepared by microemulsion method exhibits good performance to gas-phase propylene epoxidation at relative low reaction temperature of 100 ℃ .

用分子氧作氧化剂，在常压固定床石英反应器上，考察了Ag/TS-1催化剂的焙烧方式、水热处理、高温活化及反应气体预处理等对丙烯直接气相环氧化反应性能的影响。

Effect of pretreatment ( calcination method , hydrothermal treatment , activation at high temperature and pretreatment with reactant gases ) of supported silver catalyst on propylene catalytic oxidation was investigated in a fixed bed quartz reactor using oxygen as oxidant .