valve-closing造句

• Livc late intake - valve - closing engine
  进气门延迟开闭发动机
• On this base , put forward the flow of numerical calculation of the conduits and pump system , and the flow of parabola - insertion algorithm , on which the value of the midst point on the valve - closed curve can be calculated
  在此基础上，给出了管道、泵系统数值计算和阀门关闭曲线的抛物线插值算法的流程。