明渠open channel;open ditch;open trench;oper-cut drain详细»
明渠open trench详细»
明渠open channel详细»
明渠〔名词〕open channel详细»
明渠air ditch;free channel;open channel;open ditch;openchannel详细»
明渠ditch;ditch drain;free channel;free flow channel;open canal;open channel;open trench;uncovered canal详细»