The utility model relates to an air-pressure withdrawing pump .
2
中性束注入系统要求有洁净的动态高真空环境,大抽速液氦冷凝泵是满足此要求的理想真空获得设备。
The Neutral Beam Injection (NBI) system requires a clean high vacuum environment. The liquid helium cryocondensation pump with high pumping speed is an ideal vacuum obtain device.
3
该区勘探过程中,采取防砂工艺、泵抽排液工艺等技术,取得了很好的效果。
While, tech of sand control and unloading flow with pump applied in exploration work, a proper effect has been gained.