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You know that a non-usb keyboard can be completely submerged in water and/or placed in a dishwasher?
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In this case it was standard ps2 keyboard and it's clearly dead; unless you can type whitout the two lower character rows, plus some others between the remaining.
I disassembled it completely and had some corrosion on conductive traces in plastic sheets. Cleaned every piece and put it back but the damage was done.
bigben, the purpose of spirals is being able to control fin and channels dimensions, as well as flow speed,
in smooth transitions. It can acomodate different cpu sizes from a naked die to a P4. Another advantage is in the outlet system (more details later)
This is the current state of the design: Lowered the fin height at the beginning of the channel, and opened it at the end to reduce speed. Also provided space at the edge to an oring.