-Positive pressure in work area only protects sample.
	-Negative pressure in work area protects operator and environment.
	
	.png) ADVANTAGE
	ADVANTAGE
	
		 
	
		1.Air speed adjustable.
	
		 
	
		2.Tabletop type,easy to carry and save space.
	
		 
	
		3.Microprocessor control system,LED Display.
	
		 
	
		4.HEPA Filter with efficiency:99.999% at 0.3 μm