“natural gas circular network”的概念、定义、翻译、参考文献-科学参考

单词	natural gas circular network
释义	natural gas circular network Encyclopedia 工学〔燃气管网水力计算〕释 natural gas circular network天然气环状管网水力计算在天然气环状管网设计、改造或运行时，为保证系统安全、经济、合理，按流体力学计算公式，确定管径、流量和阻力损失三者之间的最佳综合指标所进行的运算。
随便看	positive quadratic differential positive quadratic form positive quantity positive ray function positive real axis positive real control positive real function positive real number positive real part positive real system positive recurrent point positive recurrent state positive reinforcement positive relation positive result positive root positive root system positive rotation positive school of criminology positive selection positive self-adjoint operator positive self-regard positive semi-definite positive semi-definite form positive semi definite Hermitian matrix

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。