| 摘要 |
Disclosed is a novel device for low-frequency electrotherapy wherein a variable resistor is used to control the output level, comprising a resistive element; a sliding member slidable along with said resistive element; a moistureproof container enclosing said resistive element and sliding member; and a guide member, attached outside said container, movable magnetically in association with said sliding member; and that the output level is controlled by moving said sliding member. |
