vacuum pump造句
61. The utility model provides a double-stage slide valve vacuum pump, which consists of an air pipe and two slide valve cylinders.
62. This Model Vacuum Pump can be used along, or as the backing pump of the other kinds of pumps, such as booster pump, diffusion pump, molecular pump etc.
63. If the compressor (12) or the vacuum pump (10) vibrate too strongly, the rotative frequency of the drive motor (14) can thus be simply modified to prevent resonance effects.
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