It is very important to describe the performance curves of centrifugal compressor by mathematical model accurately for the automatization design and management of gas transmissiontrunkline.
对于输气干线的自动化设计和管理来说，用准确的数学模型描述离心压缩机的特性曲线至关重要。
2
The method of design and calculation on in-line welding branch pipeline for gas transmissiontrunkline is introduced.
介绍了干线输气管道热连接分支管道的设计计算方法。
3
As there is something wrong with the trunkline of the network, the transmission of data is blocked. The technical staff is urgently repairing it.