paddle aerator是什么意思

用法例句

The aeration experiment of black-odor river was conducted by the use of three aerator equipments, such as paddlewheel aerator, impeller aerator and injector aerator.

利用叶轮式曝气机、水车式曝气机、射流式曝气机等3种不同曝气方式的曝气设备进行了黑臭河涌曝气试验。