1.
This paper introduces a new air negative ion producer,wbichcan producehigh concentration of air negative ions, virtually no ozone, Ozone can be con-trolled effectually.
本文介绍一种输出负离子浓度高，几乎无臭氧的空气负离子发生器。
2.
Comparation of Negative Air Ion Concentration and Daily Variation of 2 Kind of Plant Communities
2种植物群落空气负离子浓度及日变化的比较
3.
Comparative Study of Negative Air Ions of the West Lake Forest and Urban District in Hangzhou
杭州西湖山林与市区空气负离子浓度比较研究
4.
On the Variation of Negative Air Ions in the Donghu Campus of Zhejiang Forestry University
浙江林学院东湖校区空气负离子浓度变化特征
5.
Air negative ion concentration and its relationships with meteorological factors in greenbelts of Jiamusi,Heilongjiang Province
佳木斯绿地空气负离子浓度及其与气象因子的关系
6.
Study on Temporal-Spatial Distribution Characteristics of Negative Air Ions in Nature Reserve of Mountain Tianmu;
天目山自然保护区空气负离子浓度时空变化特征研究
7.
Evaluation of Aero-anion Concentration in Urban Greenbelt--A Case at the Scenic Area of West Lake in Hangzhou
城市绿地空气负离子浓度评价研究——以杭州西湖风景区为例
8.
Diurnal changes in the negative ion concentration of the air for two Cryptomeria fortunei communities of National Nature Reserve of Mount Tianmu
天目山国家级自然保护区柳杉群落空气负离子浓度日变化特征
9.
Preliminary Study on Aero-Anion Concentration of Different Vegetation Types in Forestry Recreational Areas
森林游憩区不同植被类型的空气负离子浓度水平的初步研究
10.
Different Ecological Conditions on The Concentration Aeroanion Research
不同生态环境条件对空气负离子浓度的影响研究
11.
Study on Negative Air Iions Concentration And Air Quality of Plant Communities in the West Lake Senic Area
西湖景区植物群落空气负离子浓度及空气质量变化
12.
THE DEVELOPMENT OF HIGH CONCENTRATION AIR NEGATIVE ION PRODUCER WITHOUT OZONE
无臭氧高浓度空气负离子发生器的研制
13.
Expression of hydrogenion concentrations in terms of molar concentrations is rather cumbersome.
用摩尔浓度表示氢离子浓度是相当麻烦的。
14.
Uncertainty Evaluation on Determination of Fluoride Concentration in Water by Ion Chromatography
离子色谱法测定水中氟离子浓度不确定度评定
15.
Use of Ion-selective Electrode in the Determination of Fluoride Ion Concentration in Drinking Water
用离子选择电极法分析饮用水中氟离子浓度
16.
3.5 Reduce calcium ion below 100 ppm by adding Soda Ash.
加入纯碱以降低钙离子浓度到低于100ppm。
17.
Higher salt concentrations alone may inhibit ion uptake.
单单只是盐浓度高就会阻碍离子吸收。
18.
At high calcium concentration they fuse without lysis.
在钙离子浓度高时，他们融合而不解体。