| 摘要 |
The invention concerns an ion generating device in gaseous medium, comprising one or several needles (40), having a body (40-1) and an emitting end (40-2), a composite material sleeve (42) comprising an unsaturated polyester, reinforced with glass fibre, enclosing the body (40-1) of each needle, means (44, 46, 80) for applying a voltage between two parts of the body of each needle. |
