However, very soon the disk was replaced by inverted cup, i. e. hollow cylinder and the new relay obtained was known as an induction cup or induction cylinder relay.
不过，很快磁盘被倒杯，即空心圆柱和获得新的继电器取代被称为感应感应缸杯或继电器。
2
In early days, there used to be electromechanical relay of inductiondisk-type.