Ecn abbr. 工程變更通知(engineering change notice);顯示擁塞通告(Explicit Congestion Notification);電子通訊網(wǎng)絡(luò)(Electronic Communication Networks);應(yīng)急通信網(wǎng)絡(luò)(Emergency Communications Network);表皮細(xì)胞壞死溶解(epidermal cell necrolysis)