回流

Summary: Regard guava as raw materials, adopt the organic solvent to extract the law, pass the single factor experiment and orthogonal experiment, to influence many phenol draw abstraction pharmaceutical kind of quantity, draw pharmaceutical volume mark, draw time, draw temperature factor go on the discussion compared with material liquid,etc., the ones that confirm much phenol of guava draw the craft parameter bestly: Volume mark 70% ethanol according to material 1:10 volume ratio of liquid, 70 ℃lay reflux draw 40min in temperature, many abstraction amount of phenol can reach 62.35mg/g be thing.

问题补充：不好意思，我修改了一下摘要，正文应该是：以番石榴为原料，采用有机溶剂萃取法，通过单因素实验和正交实验，对影响多酚提取量的提取剂种类、提取剂体积分数、提取时间、提取温度和料液比等因素进行探讨，确定番石榴多酚的最佳提取工艺参数为：体积分数为70%的乙醇按1∶10的料液比，在温度70℃下回流提取40min，多酚的提取量可达到62.35mg/g干物。

An ideal design of residential quarantine period space should remove the exhaled contaminant by the patients properly and establish no recirculation of airflow to the other space of the enclosure that assure the health of other person in the residential quarantine period space.

一般居家隔离空间理想之设计应确保病人呼出之污染物能迅速有效地排除，而不回流至室内空间内其他区域，如此才能确保居家隔离空间中室内其他照护人员之健康。

Two kinds of aeration modes, five kinds of amendment (rice hulls, wheat hulls, corn cores, wood chips and recycled compost) were tested.

进行了两种通风方式、5种调理剂（稻壳、麦壳、玉米芯、木片、回流堆肥）的堆肥工艺参数优化实验。

A 3D two-fluid model is also built in order to describe more accurately the fluid flow on distillation trays by comparing the computational results of quasi-single phase mathematical model with of two-fluid mathematical model.

本文采用有限体积法及计算流体力学软件&STAR-CD&对单块板以及首次对全回流下的全塔流体流动、传质过程进行了计算，计算结果如下：1。

Reflux temperature curve wide process window for various board / component surface treatment has a good solderability.

宽回流温度曲线工艺窗口，对各种板子/元器件表面处理均有良好的可焊性。

Ball Grid Array factories are characterized by long machine setup time, dynamical arrival of orders, and re-entrance of products.

球格阵列封装厂具有机台整备时间长、订单动态来到以及产品会再回流等三大特性。

Bedides, an improved water-seal is installed in front of the inlet of gas tank in order to avoid gas's returning to biomass gasifier.

气柜进气口前设一水封，用以防止气柜内的燃气回流至气化炉。

All the experimental operations were carried out under the conditions of water-free and oxygen-free in nitrogen stream (99.99%).

实验所有操作是在氮气流保护下，无水无氧操作，所用溶剂是经过除水、除氧回流后方可使用，反应原料无水氯化稀土是按文献方法合成，产品产率较高。

Urban wastewater was treated by the reed gravel bed constructed in fishpond , but the effluent could be reached the criteria of water quality for hygienic fish culture when pumped bottom water treated with reed gravel bed.

通过直接建造在鱼塘内的芦苇碎石床处理城市污水后，再抽鱼塘底层水回流到芦苇碎石床上进行再处理的试验研究表明，这种处理可使鱼塘水质达到卫生养鱼的水质标准。

Operation analysis and investigation show that it is caused by the inappropriate design of hot vapor bypass control system, so the revamping has been carried out as follows: The diameter of hot vapor bypass pipeline has been enlarged from DN 40 mm to 80 mm, and the pressure difference of hot vapor bypass adjusting valve decreased from 50 kPa to 35 kPa; A vent pipeline for non-condensable gas fro.

改造的措施主要有：增大了热旁路管道的直径(由DN40mm增大到DN80mm)，并降低了热旁路调节阀的压差取值(由50kPa降低到35kPa)；增设一条自冷凝器壳程出口至回流罐的不凝气放空管道；对脱丁烷塔分程控制系统进行了改造，即将调节器输出信号的0-45%，55%%-100%分别用于控制热旁路调节阀和放空阀。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。