H3C S12508-AC Installation Manual page 16

Figure 4 S12518 rear view
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(1) Power entry module (PEM)
(3) Switching fabric module slots (slots 20 to 28)
(5) Ventilation panel
(7) ESD-preventive wrist strap port
(9) Power air exhaust vents
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(2) Upper fan tray
(4) Lower fan tray
(6) Grounding screw
(8) System air exhaust vents
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