The flow rate and pressed pulsation in the pipe of liquid pressure is a such a complicated problem that it is hard to solve.
液压管路内的流量和压力脉动问题，是一个复杂而又难以解决的问题。
2
The RH in aeration pipe increased and the moisture was pressed into the grain bulk through the aeration pipe. The moisture was absorbed by grains and equilibriumed.
采用机械加压通风增湿调节供风管道内的相对湿度，将水汽压入粮堆使谷粒自然吸湿并平衡水分。
3
When inner side reinforcing steel bar of tip and bottom pipe were pulled, outer side were pressed.