采用进口轴密封，能承受高背压。
按应用范围又可分为低背压式、中背压式、高背压式压缩机。
According to the application and can be divided into low back pressure type, back pressure type, in high back pressure type compressor.
如果你需要升高背压，较好的方案是添加更多的滤网并增加螺杆速度。
If you need to raise backpressure, the preferred solution is to add more screens and increase screw speed.
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