1.
Study on the Aero-anion Concentration in Different Forests of Emeishan City
峨眉山市不同林种的空气负离子水平研究
2.
Effects of urban greenbelt structure on air negative ions concentration
城市不同绿地结构对空气负离子水平的影响
3.
The Study on the Aero-anion, Dust Absorption Effect and Noise Reduction Effect in Three Different Forest in Lianfengshan Park;
联峰山公园三种林地内空气负离子水平、滞尘及降噪能力研究
4.
Determination and Evaluation on Air Anion Concentration in Jilin Ganfanpen Forest Park
吉林江源干饭盆森林公园空气负离子水平的测定与评价
5.
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
6.
Study on Temporal and Spatial Distribution of the Forest and Wetland Anion Concentration in QingDao
青岛市森林与湿地负离子水平时空分布研究
7.
Studies on Negative Ion of Air and Materials and Its Application;
空气负离子及负离子材料的评价与应用研究
8.
air plasma water injection arc cutting machine
喷水空气等离子弧切机
9.
Characteristic of negative air ions of ecological rehabilitation' pilot project in Yimeng mountainous area
沂蒙山水土保持生态修复试点工程区空气负离子变化特征
10.
Let's purify air with a negative ion generator.
我们用负离子发生器净化一下空气吧。
11.
Study on the Temporal-spatial Pattern of Aero-anion in Urban Green Space;
城市绿地空气负离子分布规律的研究
12.
Spatiotemporal Characteristics of Negative Air Ions Distribution in Guangzhou in the Second Half Year
广州下半年空气负离子分布的时空特征
13.
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。
14.
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
15.
Study on the Distribution Laws of Negative Air Lons and Its Exploration and Use in Mountain Yuelu;
岳麓山空气负离子分布规律及开发利用研究
16.
The Anion Resources Research in Tourism Area of Anhui Province;
安徽省主要森林旅游区空气负离子资源研究
17.
Developing Aeroanion Resource in Forest Park of Qingling North Mountain;
秦岭北坡森林公园空气负离子资源的开发利用
18.
Research on Evaluation Standard of the Aeroanion in Forestry Scenic Spots;
森林旅游地空气负离子评价标准的研究