短語詞組短語sediment discharge of channel 河道沖淤量flood discharge channel 排洪渠discharge distribution along channel 流量沿程變化aerated discharge channel 充氣卸料槽liquid discharge channel 排液通道idle discharge channel plug 怠速出油道油道塞discharge in open channel 明渠流量die discharge channel 模頭出料道micro -discharge channel 微放電通道 返回 discharge channel