| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
|---|---|
| ERA | electrical response activity; electroencephalic response audiometry; Electroshock Research Associati... |
| AC/BC | air conduction/bone conduction [time ratio] |
| ABC | absolute basophil count; absolute bone conduction; acalculous biliary colic; acid balance control; a... |
| BC | Bone Conduction |