Please using soft-cotton fabric with neutral cleaning solvent such as toothpaste (non-matte type) or suds to wiping door surface when besmirch heavily.
污渍太重时，可使用纯棉软布蘸中性清洗剂：如牙膏（非磨砂类）、肥皂水擦拭。
Therefore, when using the vacuum pump protection devices need cleaning and drying to remove the low boiling point solvent into the pump, acid gases and solid particles.
因此真空油泵使用时需要净化干燥等保护装置，以除去进入泵中低沸点溶剂、酸碱性气体和固体微粒。
Therefore, when using the vacuum pump protection devices need cleaning and drying to remove the low boiling point solvent into the pump, acid gases and solid particles.
因此真空油泵使用时需要净化干燥等保护装置，以除去进入泵中低沸点溶剂、酸碱性气体和固体微粒。
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