在泵口压强为１０－４～１０－３托时，油扩散泵的抽速明显下降，而扩散喷射泵（油增压泵）尚未有效地发挥作用，形成薄弱区段．因此研制在高压强端抽气能力较强的油扩散泵，将能弥补这段不足，从而为真空应用设备在高压区段大量排除气体，提供理想的抽气设备． When pump pressure is 10-4 ~ 10-3 Torr, the pumping speed of the oil diffusion pump drops obviously, while the diffusion jet pump (oil booster pump) has not effectively played a role in forming the weak section. Therefore, the development of a high-pressure end of the strong suction capacity of the oil diffusion pump, will be able to make up for this shortfall, which for the vacuum equipment in the high-pressure section of a large number of exclusion of gas to provide the ideal suction equipment.