s管 meaning in English

s-tube

Firstly , working theory and structure of concrete pump are lucubrated . and the flowing state of the concrete in duct is analyzed by virtue of the rheology theory . secondly , the flowing model of concrete in duct is established , with that , the pressure loss of concrete flowing in duct is analyzed , too
论文首先对混凝土泵的工作原理和结构进行了综合分析；基于流变学原理，深入分析了泵送混凝土在输送管中的流动状态，建立了混凝土在管道中的流动模型，分析了混凝土在管道中流动的压力损失；基于运动学和动力学基本原理，对混凝土s管阀的运动学和动力学进行了分析。