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。
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。
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