exit opening meaning in Chinese

安全门
出口孔
太平门

In order to measure water usage in the plain irrigation region , economic and flexible flow measure method should be chosen at the prerequisite of making good use of exiting water works . considering the reality that the irrigation devices are usually various and the exiting open - channel flow meters are costly and inflexible , the chosen field unit should be general and worth
考虑到平原灌区中的灌溉形式和量水设施的多样化，现有的明渠流量计通用性、灵活性差，所选择的现场单元应具备通用、测控一体、性价比高的特点，既实现不同测流方案的流量计算，又达到控制水量的目的。