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1.壓力局限: 用柔性管，會使承受壓力受到限制。 1. Pressure limitation: with flexible pipe, the pressure is limited. 2.泵在運作時會產生一個脈沖流,解決方法是:使用脈沖抑制器。 2. The pump generates a pulse flow during operation, and the solution is to use the pulse suppressor. 脈沖抑制器是一個簡單的定位容器，工作原理是由于空氣比液體更具有可壓縮性，脈沖流進入容器、液體上的氣袋下陷吸收脈沖進而平緩的流出脈沖抑制器 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.蠕動泵通過調整轉速和改變泵管內徑來達到流量的變化，蠕動泵的流量范圍比較窄。 The creep pump can change the flow of the pump by adjusting the speed and changing the inner diameter of the pump tube.