Bir üst Kategori : 2804 - Hidrojen, asal gazlar ve diğer ametaller:
| Firma Adı * | Şehir / Bölge | Ülke |
|---|---|---|
| M**************************** | Viet Nam | Vietnam |
| Т************ | Germany | Almanya |
| T********* | Ecuador | Ekvador |
| N********************************** | Malaysia | Malezya |
| K******************** | . | Polonya |
| P******************************* | Malaysia | Malezya |
| О********* | Russia | Rusya |
| О********************* | Uzbekistan | Özbekistan |
| S********************* | Brazil | Brezilya |
| T******************** | Japan | Japonya |
| Z********************************** | Japan | Japonya |
| L******************** | Kenya | Kenya |
| А************************************************ | Kazakhstan | Kazakistan |
| Т************* | Kazakhstan | Kazakistan |
| M********* | Sri Lanka | Sri Lanka |
| M************************ | Malaysia | Malezya |
| S********************* | Russian Federation | Rusya |
| F******************************* | São Tomé and Príncipe | Sao Tome ve Principe |
| K************* | United States | Amerika Birleşik Devletleri |
| D********************* | Us - Pennsylvania | Amerika Birleşik Devletleri |
| A***************** | United States | Amerika Birleşik Devletleri |
| О****************************** | Uzbekistan | Özbekistan |
| D******************************* | Viet Nam | Vietnam |