高效过滤系统，确保良好工作环境。
Efficient filtering system to ensure of good working environment.
全封闭外壳与抽风系统，确保良好工作环境。
Full closure cover and exhaust system, ensure good working environment.
超声波清洗机全封闭外壳与抽风系统，确保良好工作环境。
Fully closed crust and the ventilation system, to ensure of good working environment.
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