管

Through experiments,the heat transfer performance of rolled finned tube,castiron and cast-aluminum side-finned tube used in low temperature air-coolers have been compared and analyzed.

通过实验，对缠绕式翅片管、外翅片铸铁管和外翅片铸铝管在低温空冷器应用中的传热性能进行比较和分析。

With the appearance of a free span pipeline, its loading types and stress state will be changed. Especially when ocean currents pass through it, a periodical vortex shedding is often produced and induces vibration of the free span pipeline. This type of vibration contributes a lot to the fatigue failure of a free span pipeline.

管跨段的出现改变了海底管线所承受的载荷形式和应力状态，尤其是在海流作用下流经管跨时，常伴随着周期性的涡旋发放，引发管跨段的周期性振动，成为管跨段发生疲劳失效的主要因素之一。

Theoretically,the intershell coupling makes energy bands of multiwalled carbon nanotubes split and the degeneracies in the energy bands reduced,and the bandgaps of multiwalled carbon nanotubes decreased.The small bandgaps of multiwalled carbon nanotubes ensure the presence of a vibrational manifold in the optical region for each shell so as to minimize optical emission.

计算结果表明，层间耦合使多壁碳纳米管的能带分裂，能级简并度降低，同时使多壁碳纳米管的带隙减小，小的带隙确保了每层中都存在振动模式，多数激发态电子通过相邻管的快速振动转化能量而产生无辐射跃迁，使其荧光很难观察到。

Otherwise: spiral steel protection kits, machine guard rails, aluminum towline, engineering plastics towline, rectangular hoses, hose connectors, work lights, cooling, machine tool handles, handles, hand wheels, chain-type sheet , scratch sheet-type chip conveyor in addition to the protective shutter, spring welcome home stria cricket tubes, adjustable plastic cooling pipe, scraping crumbs guide plate, damping Sizing Block, adjust Sizing Block, T-plate collision block groove series.

另有：螺旋钢带保护套、机床导轨防护罩、钢铝拖链、工程塑料拖链、矩形软管、软管接头、工作灯、冷却管、机床把手、手柄、手轮、链钣式、刮钣式除屑输送机、防护卷帘、蛐纹弹簧洗尘管、可调塑料冷却管、导轨刮屑板、减震垫铁、调整垫铁、T型撞块槽板系列等。

To investigate the pressure drop due to the friction between gas-solid suspension and CFB riser wall and its effect on the measurement of average solids holdups by pressure transducers,models for predicting the pressure drop and the solids holdup were developed.

为确定气固提升管充分发展段的摩擦压降及其对颗粒浓度测试的影响，提出了充分发展段内气固两相流与管壁间摩擦压力降的计算模型，由此获得充分发展段内真实颗粒浓度的计算公式；同时在两套提升管实验装置上对压力梯度分布和局部颗粒浓度进行了系统测试和对比分析。

According to reports this is the Nanjing airport aviation kerosene oil pipeline company is leading to the Lukou and pipeline construction site at the top of a pile-driver operator was mistakenly pipeline break so pipes to form a more than 40 cm long wound resulting in leakage of jet fuel pipe.

据介绍，这是南京崆港油料公司的航崆煤油输油管盗，是通往禄口机场的，管盗上方的施工工地的打桩机在作业时误将管盗打破，使得管盗上形成一盗40多厘米长的闯面，导致管内航崆煤油泄漏。

The value of active energy is determined to be 0.82 eV and mean lifetime in practical operation at driving current of 100 mA and an ambient temperature of 298 K is over 106 h, and high reliability and long lifetime required for light source of FOG are confirmed.

计算出了器件的激活能平均值约为0.82 eV，SLD管芯在室温下的工作寿命超过106 h，可以满足光纤陀螺用光源的寿命要求。对影响SLD管芯可靠性的因素以及管芯的退化机理进行了分析，为研制高可靠性的超辐射发光二极管提供了理论基础。

Further, The parameters, such as the diameter of expansion chamber, flow velocity, porosity of the open cell and the length of the extended tube, are also investigated.

此外，文中亦分别探讨膨胀管直径、管中流速、槽孔开孔率、入口段延伸管长度对消音器性能之影响。

This design is the Guangzhou lan west 100 markets summer the central air-conditioning system design, the primary mission completes one, two, three, four buildings load computation; Air-conditioning system plan efficient analysis and water unit's shaping; The air-conditioning system freezing stands design; Four buildings shopping area air conditioning unit's shaping, wind system and aqueous system design; Four buildings work area air blower plate tube system design; And has drawn up four winds tubes floor-plan, the wind side chart, the engine room floor-plan, the aqueous system axis side chart.

该下载资料由本站会员上传，如果侵犯了您的权力，请通知我们，将立即删除！摘要本次设计课题是广州市蘭西一百商场夏季中央空调系统设计，主要任务是完成一、二、三、四楼的冷负荷计算；空调系统方案的经济性分析和制冷机组的选型；空调系统冷冻站的设计；四楼购物区空调机组的选型，风系统和水系统的设计；四楼办公区风机盘管系统的设计；并绘制了四层风管平面布置图、风管轴侧图、机房平面布置图，水系统轴侧图。

The novel pressure decrease technique was applied in developing capstan anti-G suit so that the problem of tenderness on abdomen of pilots could be overcome, the comfort and + G protection capability for pilots were improved.

在管式抗荷服的腹囊和两侧管囊间分别装上分压装置和泄压活门，将腹囊内的压力降至管囊内压力的40%左右。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。