biosafety cabinet cl 2 type a2 nuaire nuaire labgard es nu 540 cl ii type nuaire labgard cyto nu 581 cl ii om0317 nu 540 biosafety cabinet manual laboratory biosafety cabinet type a2 nuaire biosafety cabinet 4ft the biosafety cabinet cl 2 type a2 nuaire biosafety cabinet cl 2 type a2 nuaire nuaire biosafety cabinet 4ft the nuaire labgard es nu 560 cl ii type nuaire labgard es nu 540 cl ii type nuaire labgard es nu 540 cl ii type nu 581 biosafety cabinet