四氯乙烯

Taking the shell fabrics and adjuvants used for the winter dress as the example, based on the structure parameters test and dry-cleaning experiments with petroleum solvent and tetrachloroethylene, the sample performance before and after dry-cleaning, such as thickness, dimennsion contraction, crease recovery angle, drape coefficient bending stiffness and color difference and so on, is tested.

以冬季女上装常用面料和里料为例，在对其进行结构参数测试和石油溶剂、四氯乙烯干洗剂干洗实验的基础上，对试样干洗前后的厚度、尺寸变化率、折皱回复性能、悬垂性、刚柔性、色牢度等相关性能指标进行了测试，着重就干洗对服装面辅料性能的影响进行了对比分析和总结。

A kind of blue encapsulated electronic ink microcapsule was prepared by in situ deposition method utilizing urea and formaldehyde solution as aqueous phase and tetrachloroethylene dissolved with oil solvent blue dye as oil phase under different pH condition and Polyvinyl Alcoholand gelatin as modifying agent,respectively.

以溶有油溶蓝的四氯乙烯为油相，以甲醛和尿素溶液为水相，分别利用明胶和聚乙烯醇作为改性剂，在不同pH条件下，利用一步原位沉积法制备出脲醛树脂微胶囊，方便快捷。

Shoeshine usable gas or tetrachloroethylene, reoccupy wet powder alkali removal scrub.

鞋油可用汽油或四氯乙烯润湿后，再用洗衣粉碱液擦洗去除。

Conclusion］The neurasthenia and lower serum albumin in workers were due to the bad ventilation in the laundries and the chronic exposure of workers to tetrachloroethylene.

结论］部分干洗房容积偏小，通风不良，作业工人长期接触四氯乙烯可能引起神经衰弱及肝功能损害。

ESCA results show that silica is coated on surface of the polymeric microspheres. SEM analysis reveals that when water was used as a solvent, uniform silica coating on the surface of organic microsphere can be obtained, and when the reactive time is 10 minutes, an uniform coating layer can be prepared. But when tetrachloroethylene was used as a reactive solvent, an inhomogeneous silica coating is found on the organic microspheres.

由化学分析电子光谱仪纵深分析可以得到，矽的前驱物是藉由披覆方式附著在有机微球表面；SEM分析发现以水为溶剂所合成出之披覆有二氧化矽的有机微球表面呈现均匀披覆效果，并且当反应时间为10min时表面均匀披覆效果最好；而以四氯乙烯为溶剂的系统所合成之微球则呈现不均匀披覆。

Usable gas, ethanol, tetrachloroethylene, reoccupy scour catharsis.

可用汽油、酒精、四氯乙烯去除，再用洗涤剂洗涤。

After this production unit is improved, can use at producing 4 chloric ethylene.

该生产装置改进后可用于生产四氯乙烯。

Earlier this year, PCE and MDC announced they were forming a joint venture to offer MDC's proprietary Dymaxion drilling technology to companies in China, to help degasify their coal mines.

今年早些时候，四氯乙烯和麦道公司宣布，它们将组建一家合资企业，麦道公司提供的专有dymaxion 钻井技术给中国公司，以帮助degasify煤矿。

The present invention adopts ammonium salt solution as leach, and adopts the liquid-phase oxidation activating agent formed from surfactant sodium ligno-sulfonate or sodium dodecyl sulfonate, liquir phase oxidation catalyst Cu(2+) and sulfur-extracting agent tetrachloroethylene to implement quick leaching process of sulkfide mineral in gas-liquid-solid three-phase reactor, all the sulfurs contained sulfide in mineral powder can be converted into elementary sulfur and sulfuric acid radical, the contained zinc, copper, nickel, cobalt, lead, cadmium and silver can be changed into soluble salt, and fed into leach or remained in the leaching out slag.

本发明涉及的有色金属硫化矿的铵盐液相氧化直接浸出方法，其特征在于：采用铵盐溶液作浸出剂，采用由表面活化剂木质磺酸钠或十二烷基磺酸钠，液相氧化催化剂Cu2+、萃硫剂四氯乙烯组成的液相氧化活化剂，在气液固三相反应器内，实现硫化矿的快速浸出过程，矿粉中各种硫化物所含的硫转变为单质硫和硫酸根，所含的锌、铜、镍、钴、铅、镉、银等变成可溶性盐类进入浸出液中或留在浸出渣中，消除传统流程中二氧化硫，硫化氢，氮氧化物及含砷含汞含铅等有毒烟气的排放。

Microcapsules of E-ink was prepared through in situ polymerization, in which titanium dioxide modified by PMMA was introduced as displaying particles dispersed in carbon dichloride, and urea-formaldehyde resin modified with melamine as wall material. Also, the polymerization process was studied to optimize the reaction conditions.

采用原位聚合法制备了以三聚氰胺改性脉醛树脂为壁材，聚甲基丙烯酸甲酯修饰二氧化钦为显示颗粒，四氯乙烯为分散介质的电子墨水微胶囊，并对制备工艺进行优化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。