Mechanical transition (機械式転移 Kikai-shiki ten'i, localized as mechanical teleportation) is a way to transport objects from one place to another through the power of machines (science). It is used by Kokonoe Mercury. It has more limitations than transition magic, such as requiring time to set coordinates.
This type of transition usually only transports objects from Kokonoe, but it is possible to teleport to her using special "keys", Tager is one of them. When Lambda-11 teleports to Tager, the transition is very stable, because her Idea Engine is attracted to his Event Weapon Imitation.