1.压力局限: 用柔性管，会使承受压力受到限制。 1. Pressure limitation: with flexible pipe, the pressure is limited. 2.泵在运作时会产生一个脉冲流,解决方法是:使用脉冲抑制器。 2. The pump generates a pulse flow during operation, and the solution is to use the pulse suppressor. 脉冲抑制器是一个简单的定位容器，工作原理是由于空气比液体更具有可压缩性，脉冲流进入容器、液体上的气袋下陷吸收脉冲进而平缓的流出脉冲抑制器 Pulse suppressor is a simple container, principle of work is due to the air more than liquid compressibility, pulse air pocket subsidence flow into the container, liquid absorb pulse and gentle flow pulse suppressors 3.蠕动泵通过调整转速和改变泵管内径来达到流量的变化，蠕动泵的流量范围比较窄。 The creep pump can change the flow of the pump by adjusting the speed and changing the inner diameter of the pump tube.