“engine variable valve timing control”的概念、定义、翻译、参考文献-科学参考

单词	engine variable valve timing control
释义	engine variable valve timing control Encyclopedia 工学发动机电子控制系统释 engine variable valve timing control发动机可变气门正时控制通过机械、电磁或液压控制等方式，改变发动机气门开始开启和关闭时刻的气门正时，从而改善燃烧过程，尽量减少耗油量和废气排放，从而提高发动机的综合性能的技术。
随便看	security middleware security model security monitoring and control security monitoring and control of pipe networks security monitoring center security of archives security of collection storage room security of cryptographic hash function security of cryptographic protocol security of debt security of file content information security of information content security of nuclear weapon security of supply and demand for analysis security parameter index security parameter index, SPI security policy security protection security protection risk assessment security protection risk treatment security protocol security protocol analysis security requirements security risk security risk analysis of E-government

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