1)  single stage extraction
单级萃取
2)  single contact extraction
单级萃取
3)  single-stage extraction
单级萃取
4)  single-stage extraction tank
单级萃取槽
5)  single-stage
单级
1.
Design and Experimental Studies of Single-stage and Double-stage Pulse Tube Refrigerators;
单级和两级脉冲管制冷机的设计和实验研究
2.
Analysis of a single-stage high power factor electronic ballast with class-E resonant inverter is proposed.
提出了一种E类驱动结构的谐振式电子镇流器,将E类结构和buck-boost功率因数校正结构整合成一种单级式电子镇流器。
3.
A single-stage and high power pulse tube cooler working between 20~40 K has been designed and constructed in order to precool the second stage of a 4 K separate two-stage pulse tube cooler.
为了满足液氦温区分离型二级脉管制冷机第二级预冷的需要,设计制作了1台20~40K温区单级大功率脉管制冷机。
6)  single stage
单级
1.
Experiment of single stage G-M coaxial pulse tube refrigerator;
单级G-M型同轴脉冲管制冷机实验
2.
The single stage and two stage SBR systems were investigated for treating high concentrated cattle farm wastewater and the performances were compared in terms of the removal efficiencies of carbon, solids and nitrogen.
对单级和两级序批式反应器 (SBR)用于牛场高浓度有机污水的处理进行了试验研究 ,对其污水处理性能进行了比较。
3.
The introduction of dual-boost single stage DC/AC converter is firstly shown,the analysis of the converter s working principle is taken,and the logical relationship of the driver train to the power devices when they are working at SPWM state in the inverter is given.
介绍了双Boost DC/AC单级正弦波逆变电路结构,并分析了其工作原理。
参考词条
补充资料:单级萃取
分子式:
CAS号:

性质:又称一次接触萃取。是溶剂萃取中最简单的一种操作方式。萃取过程系在一个单级的萃取器中进行,如图所示(图暂缺)。单级萃取可以间歇地进行,也可以连续地进行。间歇操作常在搅拌槽中进行,连续操作则通常在一个单级的混合澄清槽或单级离心萃取器中进行。萃取时,两相F与S在一次接触中,在极限情况下可以达到平衡浓度。由于溶质在两相中的分配系数数值是有限的,因此单级萃取后的萃余相及中往往含有较多的欲萃溶质,不能满足萃取率的要求。工程上一般都用多级萃取。

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