electric alarm的用法和樣例：
例句
- Magnetic snap-action electric alarm contacts are used in adverse operating conditions.
磁性吸合電警報接點(diǎn)用于相反的操作條件。 - Electric alarm contacts open and close circuits in response to the position of the pressure gauge pointer.
電警報接點(diǎn)根據壓力表指針的位置開(kāi)啟和關(guān)閉電路。
