略語大辞典 [MIL] 20 COGA(O)G* combined gas turbine and (or) gas turbine (艦艇の機関形式で)高速用・低速用ガスタービン併用(切替).combined gas turbine and (or) gas turbine; [MIL:Mech]. 丸善「略語大辞典」JLogosID : 11869934