The method of design and calculation on in-line welding branch pipeline for gas transmission trunk line 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。
It is very important to describe the performance curves of centrifugal compressor by mathematical model accurately for the automatization design and management of gas transmission trunk line.
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。
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