This is also called Extension Card, but, these years, with respect to a circuit, this Geta is less used in the circuit because the faulty circuit board is replaced entirely without implementing on-site diagnosis by reason of multiple use of integrated circuit and personnel expenses for repair.
ExtensionCardとも言われるが、近年、回路は集積回路の多用や修理の人件費から故障した回路基板は現場で診断せず丸ごと交換され、この下駄の使用は少なくなっている。