管

Under normal circumstances a 90-degree elbow bend resistance than 120 degrees, and each 90-degree bend head loss of about 0.5 ~ 1 m, each 20 m pipeline will enable the head of the resistance loss of about 1 meter.

一般情况下90度弯管比120度弯管阻力大，每一90度弯管扬程损失约0.5～1米，每20米管道的阻力可使扬程损失约1米。

A Lithium-Bromide absorption refrigerating machine is designed using inclined fin tubes as heat transfer elements for absorber and using other corresponding heat transfer enhancement elements for the other heat exchangers. Comparing with the machine of using bare tubes, this unit can save bronze by 19%, steel by 28%, space by 36%. And a lot of operating expenditure can be reduced at the same time.

用斜槽管作为吸收器中的传热管，并在其它传热部件中采用相应的强化传热元件，设计了一台溴化锂吸收式制冷机，与全部采用光管的机组相比，节省了19%的铜材、28%的钢材，整体体积减小了36%，同时还节省了其它费用，显示出较好的经济效益。

Yuxing is assembled with three Taiwan-imported production lines of auto spiral paper tubes, one unit of paper tube hectograph printer, one unit of copperplate rotating printer, a set of improved polishing, cutting and material quality testers, and a complete suit of paper jar packaging machinery, fully meeting customers' requirements for product quality.

中山市裕兴纸管厂拥有三条台湾引进的自动螺旋纸管生产线，为生产纸管配套的胶板及铜板轮转式印刷机各一台。磨光、分切及材料质量检测设备完善，还拥有全套生产纸罐包装机械设备，可完全满足各客户的产品质量要求。

Capillary imbibition oil displacement as an important factor should be analyzed emphatically in the fractured oil reservoir with low permeability.

文章利用量纲分析方法研究了考虑毛管压力的一维非混相驱替过程，得到了毛管压力的无因次表达式，分析了驱替过程中毛管压力的影响因素。

Qingdao°·French°·company to introduce a complete set of production technology and management experience, specializing in the kinds of non-standard heat pipe radiator (IGBT, GTO, diode, thyristor, optical devices, such as heating power devices used), water cooling plate, heat pipe heat exchanger (for closed, air / air), and the molten metal heat insulation direct immersion heater used for research and development and production.

青岛阿特姆全面引进法国阿特姆公司的全套生产技术和管理经验，专业从事各种非标热管散热器（IGBT、GTO、二极管、晶闸管、光学器件等发热功率器件用）、水冷却板、热管换热器（适用封闭箱体内，空气/空气）、以及熔融金属加热保温用直接浸入式加热器的研究和开发生产。

Limited features in advantages of low heat conduction coefficent, favorable silence effect, incombustibility innoxiousness, corrosion-resistance, aging-resistance, easy installation, light weight, good heat preservation and long lifetime compared with other types heat preservation wind pipes, and is widely applied in industrial and civil center air conditioning area.

上海唐博复合风管有限公司生产的TB系列复合玻纤风管，与其他保温风管材料相比，具有导热系数低、消音效果好、不燃、无毒、耐腐蚀、不易老化、安装简捷、重量轻、保温性能好、寿命长等一系列优点，在工业及民用等中央空调领域中正受到广泛应用。

Results The total 100 frontal sinuses were all revealed. Of 100 ostia, nasofrontal ducts, ethmoid infundibula, and middle nasal meatuses, 4 didn't show up and 96 could be viewed with air channel and bone channel structures well demonstrated in 70, and the remaining 26 still showed their bone channel structures though their air channel structures were vanished.Conclusion The structures of the ostium of frontal sinus, nasofrontal duct, ethmoid infundibulum, middle nasal meatus, etc.

结果 50例被检查者的50个额窦全部显示；100个窦口、鼻额管、筛漏斗及中鼻道结构，4个未显示，96个被显示，其中70个窦口、鼻额管、筛漏斗及中鼻道的气道结构和骨结构均清晰可见，26个窦口、鼻额管、筛漏斗及中鼻道的气道结构消失但骨结构仍可见。

By means of forced synchronization of current in thyristor branch with the line current, the mode switching from capacitive mode to Bypass can be implemented. In the switching strategy from capacitive mode to inductive veriner mode, a method of thyristor conditional firing is put forward. The thyristors will be fired and conducted on condition that both line current and capacitor voltage are inphase.

通过强制晶闸管支路电流与线路电流同步，实现由容性区到Bypass模式的切换；在由容性区到感性微调模式切换的过程中提出了晶闸管条件触发的方法，即当线路电流和电容电压满足同向条件时晶闸管才触发导通。

The influences of reservoir pressure and pulse duration on instantaneous velocity are investigated.

在由 3根陶瓷滤管组成的实验装置上，利用热线风速仪对脉冲反吹时滤管外瞬态流场进行了测定，分析了喷吹压力和脉冲宽度对滤管外流场的影响。

Meanwhile, we explored discharge characteristics and influence factors (interelectrode distance, temperature, atmospheric pressure, relative humidity, etc) through experiments. To optimize the characteristics of ionization sensor, we studied the diameter, distance and height of carbon nanotubes when field effects of carbon nanotubes were in optimized conditions.

出于优化电场效应、增强纳米碳管气敏传感器气敏性的需要，本文实验研究了纳米碳管直径、间距和高度的可控制备方法，最终传感器采用了符合电场效应优化条件的纳米碳管材料。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。