LPG can be replaced by DME as city gas, but pipeline transmissionpressure shall not be too high, and gas supply range shall not be too wide.
二甲醚可替代LPG作为城市燃气，但管道输送压力不宜过高，供气范围不宜过大。
2
In order to achieve a remote measurement for fluid flow, research was made on theoretic models and experimental measurement methods for transmissionpressure wave of the horizontal pipeline.
为了实现流体流量的远程测量，研究了水平管道中压力波传播的理论模型及测量方法。
3
The larger the transmissionpressure, the bigger the pressure relative error; the bigger mass flow rate, the bigger the relative error; the longer the pipeline, the bigger the relative error.