They were incorporated into gothic stonework as early as the 13th-century to keep rain water off cathedral roofs, their mouths serving as the ejector spout.
早在13世纪，这种哥特式建筑是为了存储教堂屋顶上的淌下的雨水建造的，他们的嘴巴就像是喷泉口。
2
The operation characteristics and the energy-saving based importance of water steam ejector was analyzed, the effect of the ejector in practical use was presented.
分析了此类喷射器的工作特点和节能意义，介绍了此类喷射器在实际中的使用情况。
3
A sampling project for the water quality automatic monitoring system was introduced in this paper, self-absorption-ejector pump was used in the system instead of centrifugal pump.