| ista.com | |
| 网站标题： | ista International GmbH | ista |
| 网站简介： | ista International GmbH specialises in the recording, billing, visualisation and management of heat, water and gas in 25 countries all over the world. |
| 关键字： | energy efficiency transparency energy sustainability energy consumption billing energy billing ista international |
| aeb.org | |
| 网站标题： | aeb.org |
| 网站简介： | aeb.org |
| 关键字： | aeb.org |