| 摘要 |
The charging device has a compressor with at least one spiral (2) rotating in a casing (1). The casing has a conical surface facing and parallel to the spiral surface, separated by a small gap to prevent contact. The casing air intake (3) is at the large-diameter end and the exit (4) at the small-diameter end. The radial height of the spiral decreases from the intake towards the exit.
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