Several main issues such as withstand voltage correction,equipment external insulation,air clearance,creepage distance and pollution influence,are discussed in this paper by taking an example for external insulation design of Xingren converter station.
高海拔地区的直流换流站外绝缘问题是一个具有普遍意义的综合性问题,结合位于高海拔地区的兴仁换流站的外绝缘设计对高海拔地区的耐受电压修正、设备外绝缘、空气净距、爬距计算及污秽影响等多个层面对高海拔地区换流站的外绝缘问题加以讨论。
Dealt with the growing depth of macrophytes roots, spatial distributions of microorganisms and enzyme in artificial wetland and comparison of removal rates of contaminants in different depths of artificial wetlands, the better purifying space in artificial wetland wastewater treatment system has been discussed.
从人工湿地水生植物根系实际生长深度、微生物及酶的空间分布以及不同深度人工湿地对污水的净化效果比较出发，研究了人工湿地污水处理系统的净化空间，以种植香蒲Typhaangustifolia和灯心草Juncuseffusus的人工湿地为例，水生植物根系主要分布在湿地基质上层25cm区域；微生物的数量随深度增加而递减，且35cm层的数量远远的低于上层；5－10cm层的磷酸酶、纤维素酶和蛋白酶活性亦大于20cm层；60cm深的人工湿地与20cm深的人工湿地对污水中污染物的净化效果基本一致。
Air Clearance and Its Altitude Correction Method for the DC Side of Converter Stations
换流站直流侧空气净距及海拔修正计算方法
Oil-Free Lubrication & Air Purification
无油润滑及空气净化
Fresh, pure air.
新鲜的、纯净的空气
The air here is fresh and clean.
这里的空气新鲜、纯净。
the benign influence of pure air.
纯净空气的有益影响。
Remove air cleaner housing.
拆去空气净化器外壳。
air cleaner and silencer
空气净化器及消声器
1. STRUCTURE OF THE CLEAN AIR ACT
一、《洁净空气法案》结构
Fresh air cleans the blood.
新鲜空气能净化血液。
They clean the air and keep water from running away.
它们净化空气，保持水土。
Trees help clean the air.
树木有助于净化空气。
The Effect of AOS-80 Air Cleaning Devices on Air Quality of Henhouse in Winter
AOS-80空气净化机对冬季鸡舍空气的净化作用
Efficacy of air-purifying system on purifying air of operating department in hospital
空气净化系统对医院手术部空气净化效果分析
Preparation of Air Purification Mineral Wool Board and Research on Purifying of Formaldehyde
净化空气矿棉板的制备及其净化甲醛性能研究
Status of Air Purification in Different Situations of Clean Operating Room
洁净手术室不同状态下空气净化状况测量
The study of air purifing effects of the vehicle-inner cleaner
车用净化器对车内空气质量净化效果的研究
Efficacy of TA series of air purifiers in purification of indoor air
TA系列空气净化机对室内空气净化效果的应用观察
the process of exposing to air (so as to purify).
使空气通畅（以达到净化空气目的）的过程。