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PVA-2080 is one of the important dispersing agents to produce loose polyvinyl chlorid. At present KH-20 is mainly imported from Japan to take the place of the traditional gelatin to produce high quality PVC in our country. In order to solve this problem, we exploit PVA-2080 to replace the foreign products. The experiment includes two steps of polymerization and a process of partial alcohlysis. After a number of trials, we get a product of white particles.Its average degree of alcoholysis is 80.77% and t...

聚乙烯醇- 2 0 80 (PVA - 2 0 80 )是生产疏松型聚氯乙烯的重要分散剂之一目前，国内主要依靠进口日本的KH - 2 0以代替传统的明胶来生产高质量的PVC产品为了解决这一问题，作者开发了PVA - 2 0 80 ，以代替国外进口本试验经过两步聚合和部分醇解等过程，通过正交试验优化试验条件，得到了外观为白色粉末状颗粒、平均聚合度为 2 0 4 2、醇解度为 80 。77%的产品经小釜应用试验，效果比较理想

But partial staff member disinfects technical inexperience, the disappear venom chroma that make up is unqualified, alexipharmic time is insufficient, all be the cause that causes a bacterium to exceed bid. 2.2 small microclimate and air quality circumstance indoor temperature, wind speed and CO2 content all accord with 6 guesthouse wholesome requirement.

但部分工作人员消毒技术不熟练，配制的消毒液浓度不合格，消毒时间不够，均是导致细菌超标的原因。2.2微小气候和空气质量情况6个宾馆室内温度、风速和CO2含量均符合卫生要求。

Partial ordered set is an algebraic structure. It is of great practical significance to study the relation between the order and various applied sciences, such as computer science, management science and social science.

偏序集是一个拓代数结构，建立序与计算机科学、管理科学及社会科学中各种不同的应用的联系，其研究具有重要的实际意义。

Following confirmation by RFLP and partial sequence analysis, the aliquot mutant viruses (3μg) were used to transfect CEM×174 cell line, and the concentration of SIVmac main core protein(P27) in culture supernatants was closely monitored by enzyme-linked immunosorbent assay in order to identify the replicating ability of the mutants.

一般认为，外膜糖蛋白在病毒的感染和免疫中起重要作用，而SIVmac239和SIVmac142克隆之间envGP区核苷酸的差别，是否提示SIVmac239克隆的致病性或毒力与envGP全区、部分或个别核苷酸有关，仍需要进一步研究〔2，3〕。

The catalytic partial oxidation process is now the main technology method for conversion of alkane in coke oven gas.

催化部分氧化工艺是目前焦炉煤气烷烃转化的主要技术手段。

The gasification of feedstock was inhibited via increasing of the partial pressure of N2 in the reactor and the proportion of gas-phase reaction was reduced consequently.Thus,the alkylate oil with relatively high quality was obtained.

以氮气调节反应的操作压力，可以较好的减少烷基化原料的气化，降低气相反应的比例，得到质量较高的烷基化油。

Typically, there is partial alopecia with a varying amount of inflammation.

通常情况下，有部分脱发有不同数量的炎症。

The technique of boundary-fitted coordinate system is used to overcome the difficulties resulting from the complicated shapes of natural river boundaries;the method of alternating direction implicit finite difference scheme is used to solve the partial differential equations in the transformed plane;and the technique of moving boundary is used to deal with the river bed exposed to water surface.

用适体坐标技术克服天然河道复杂的几何边界给有限差分法所带来的困难；用交替方向隐式有限差分格式求解变换平面上的偏微分方程；用动边界技术处理河床的淹露。

And this year we also added a 4A zeolite, solid, liquid sodium aluminate, etc. Partial products.

并且今年我们还新增了4A沸石、固体、液体偏铝酸钠等项目的产品。

So it may be inferred that the protolith of the amphibolite is the product of different degrees of partial melting of the mantle in a magma arc.

显示出壳源性质或者是受到大陆下地壳的混染作用而形成。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。