Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 111)

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4.
To reinstall the diffuser, ensure that the two holes on the back edge of the
diffuser align with the diffuser support pins on the rear wall of the work area, as
shown in Figure 6-23.
Figure 6-23
Diffuser pins engaging the holes in the
rear of the diffuser.