A concrete pump can accomplish transportation of concrete horizon- tal and vertically just-for-once pump. It is especially applicable to pumping concrete in the condition of high-rise buildings or long-dis- tance complex landscapes. Along with the development of construc- tion technic and the popularization of mature technics, the demand from consumers about these equipments is getting higher and higer. In particular, the combination of hydraulic control technic and elec- tronic computer technic has accelerated the development to a great degree in the past ten years. [caption id="attachment_372" align="alignnone" width="300"] trailer concrete pump[/caption] Underwater pouring concrete, also known as conduit concrete, is a method of pouring concrete through a vertical pipe, depending on the weight of the concrete. The principle of concrete mixture is in the gap between the certain pressure, into the early concrete following perfusion through the catheter sealing connection, holds above the initial concrete and pouring mud gradually increased, the formation of concrete pile continuous compaction underwater infusion method of towed concrete pump is a combination of super-fluid concrete perfusion and catheter perfusion.It used TL-type reverse circulation drilling rig to drill a hole,filled into the reinforcement cage,and pumped out the serous.