Features 1. 采用結實的鋁合金外殼,不銹鋼或塑料提手,使用輕便,功能全面。 Portability and versatility with a tough, aluminum cover and stainless steel or plastic handle. 2. 提供了一個潔凈的真空環境,不會對系統產生污染。 Provide a clean vacuum and won’t contaminate your system. 3. *的皮膜設計減少磨損,延長工作壽命。 Unique flat diaphragm design reduces wear and tear for long service life. 4. 內設過熱自動保護裝置防止電機損壞,延長泵的壽命。 Built-in heat-triggered protector prevents motor damage and extends pump life.