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pjp

  • 网络肺炎;部分熔透;固定拜访计划;肺孢子菌肺炎;熔透
pjppjp
  1. Pump jet propulsor ( PJP ), which was developed in the past several years , is a new propulsor with high propulsion efficiency , high critical velocity and low radiated noise .

    泵喷推进器是近年来发展起来的一种推进器,具有推进效率高,辐射噪声低,临界航速高的优点。