IBM NeXtScale nx360 M4 Installation And Service Manual page 16

Statement 12
CAUTION:
The following label indicates a hot surface nearby.
Statement 26
CAUTION:
Do not place any object on top of rack-mounted devices.
Statement 27
CAUTION:
Hazardous moving parts are nearby.
Rack Safety Information, Statement 2
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IBM NeXtScale nx360 M4 Type 5455: Installation and Service Guide