If you work with filters—whether you're a manufacturer, a mechanic, or a car owner who cares about engine health—you've probably heard the terms "full glue paper" and "half glue paper." But what do they actually mean? And does the difference really matter for engine performance? The short answer: ...
German scientists have confirmed through research that the concentration of negative oxygen ions in the human living environment is directly related to the level of human health. In Professor Lin Jinming's book "Environment, Health, and Negative Oxygen Ions", it is mentioned that negative oxygen ...