Juniper MX240 Hardware Manual page 324

Figure 110: Do Not Carry an FPC with Only One Hand
Do not rest any edge of an FPC directly against a hard surface (see
rest the FPC temporarily on an edge while changing its orientation between vertical and horizontal, use
your hand as a cushion between the edge and the surface.
Figure 111: Do Not Rest the FPC on an Edge
Figure 111 on page 328). If you must
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