呼吸道清除功能失效
ineffective airway clearance
ineffiective airway clearance
AIS航道管理平台
AIS platform for channel management
安徽省航道管理局
anhui province channel administrative bureau
北槽深水航道
deep-water channel in the north channel
北江航道整治工程
Beijiang waterway regulation engineering
北江芦苞浅段航道
Keywords: channel at Lubao shallow reach of Beijiang River