环

In vortex ring zone, streamwise vorticity and vortex ring wrap together and interact each other. This interaction leads to the breaking of vortex ring.

在涡环区，流向涡和涡环相互缠绕，相互作用，导致涡环的空间失稳及最终破碎，涡环的破碎标志射流开始转捩进入湍流阶段。

It is worth to be noted that the needed driving current to the MR valve with both annular and radial damping gaps is less than that to the MR valve with annular damping gaps under the cut-off state of the MR valves, which show that the MR valve with both annular and radial damping gaps consumes less energy.

测试结果显示：（1）在相同的工作条件下，同时具有圆环和圆盘阻尼间隙的磁流变阀产生的压降更明显；（2）处于截止状态时，同时具有圆环和圆盘阻尼间隙的磁流变阀的激励电流明显小于具有圆环阻尼间隙的磁流变阀的激励电流，因此采用同时具有圆环和圆盘阻尼间隙的磁流变阀可以节约能量的消耗。

Included in the complete filling of the following letter of component parts inside the part or all of the combination of: packing, packing gland, packing nuts, rings, packing spring, packing flange, packing flange stud or single-head bolt , packing flange nuts, packing ring, packing isolated loop, blankets isolation ring, BeIIev Sichuan e springs and anti-extrusion ring.

包括在完整的填料函组件里的是下列零部件的部分或全部的组合：填料、填料压盖、填料螺母、套环、填料弹簧、填料法兰、填料法兰双头螺栓或单头螺栓、填料法兰螺母、填料环、填料隔离圈环、毛毡隔离圈、BeIIev川e弹簧和抗挤压环。

Then the technological flow and problems of the drying section which need to solve are discussed in detail. According to the design rules and development process of computer control system, a set of control system for the drying section of shaft furnace pellet plant is designed.

首先在对烘干过程进行机理分析与辨识的基础上进行控制算法设计，系统整体采用串级控制方案，内环温度环采用基于遗传算法参数整定的PID 控制，外环水分环采用模糊控制。

Our results show that the duality of self-dual tetrahedral link is "trivial", and the duality of hexahedral and octahedral link as well as dodecahedral and icosahedral link are "nontrivial".

从构型角度考虑，四面体链环的自对偶是&平凡&的，六面体链环和八面体链环，十二面体和二十面体链环的对偶是&非平凡&的。

Based on the-references on the thermal imidization of polyand the polymer composition analysis,the thermal imidization mechanism of SMA with aniline was demonstrated to be a two-stage consecutive reaction,in which a second-order reversible ring-opening reaction of SMA to produce poly(styrene-co-N-phenyl-maleamic acid)and a first-order irreversible intrachain ring-closing reaction to form SNPMI were involved.

论文首先参考聚酰胺酸热环化反应，并通过SMA酰亚胺化产物的组成分析，确定了SMA与苯胺的热酰亚胺化反应机理为一个包含由SMA生成苯乙烯—N-苯基马来酰胺酸共聚物的二级可逆开环反应以及由SNPMA生成苯乙烯—N-苯基马来酰亚胺共聚物的一级不可逆分子内闭环反应在内的串联反应过程，其中第二步SNPMA闭环反应为控制步骤。

The main feature of the annular preventer (Fig. 2), sometimescalled s'universal" or "bag''-type BOP, is the capability to close and seal on almost any size tools in the borehole-drillpipe, tooljoints, drill collars, kellys, easing, etc.-within most of its range, It also has the capability to seal off the open hole, The heart of the annular preventer is the sealing element Fig.

环型BOP's 环型防护设备的The主要特点(图2)， sometimescalled s'universal&或者&bag''-type BOP，是关闭的能力，并且在几乎任何大小工具的封印在钻孔钻杆、钻具接头、钻环， kellys，缓和等等-在大多数它的范围之内，它也有封锁的能力开放孔，环型防护设备的心脏是密封件(图3)。

In Q109, but April +0.4% MoM; 5 Industry split: steel and shipping continued to see losses; petrochemical , machinery and auto saw smaller earnings drop; coal, building material and trading saw stable profits; tobacco and property saw earnings increase.

国企：财政部昨日公布的1—4月全国国有及国有控股企业经济运行情况显示：1）营业收入：1—4月，全国国有企业实现营业收入同比下降7.3%，降幅比1—3月缩小0.3个百分点，4月比3月环比下降5.1%；中央企业实现营业收入4月比3月环比下降10.5%；2）利润：1—4月，全国国有企业实现利润同比下降32.3%，降幅比1—3月缩小4.5个百分点；4月为连续第9周同比下降，但环比上升；其中，中央企业实现利润4月比3月环比下降4.8%；3）成本：1—4月，全国国有企业营业成本同比下降7.1%，管理费用、财务费用同比分别增长2.4%、15.9%；4）存货：1—4月，国有企业存货同比增长13.1%，增幅比1—3月减少1个百分点，4月末比3月末增长0.4%；5）分行业看，钢铁、海运行业继续亏损；石油石化、机械、汽车等行业实现利润降幅收窄；煤炭、建材、商贸等行业实现利润较为稳定；烟草、施工房地产行业实现利润进一步提高。

2 The provisions of valve flap stent thrust nut in space; 4.3 will bring more than ejector stem components, and into the valve flap bracket, now can adjust screw ring on the injector; adjustment ring discharge pipe may be twisted too high in case of this case, when the valve assembly after the valve flap in contact with its seat before the valve flap seat will have an additional load on the adjustment ring edge, in order to avoid this from happening, should enable the adjustment ring hole just below the injector thread, through which holes should not be able to see thread.

4.2 规定阀瓣支架与止推螺母中的间隙； 4.3 将喷射器提起超过阀杆组件，并放到阀瓣支架上，现在可以把调节环拧在喷射器上；调节环可能在排放管上拧得太高，如遇此情况，当阀门组装后，在阀瓣与其座相接触前，阀瓣座将加载荷于调节环的边上，为了避免此情况的发生，应使调节环上的孔正好低于喷射器的螺纹，通过这些孔应不能看到螺纹。

The four cigars in the new Montecristo Open range are the Junior, 38 ring gauge by 4 1/3 inches, the Regatta, 46 by 5 1/3 inches, the Master, 50 by 4 7/8 inches, and Eagle, 54 by 5 7/8 inches.

Montecristos新雪茄系列中的这4种雪茄是：环规38，长4 1/3英寸的Junior、环规46，长51/3英寸的Regatta、环规50，长4 7/8的Master，以及环规54，长5 7/8的Eagle。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。