3 switch lamp

158

02:02:39

if you alone and you want turn on the light of the huge hall ,the hall have 3 door.
when you in to the hall through any door.
You just turn on the switch.
and you out of the hall to any door.
you just turn off the switch.

when you want control the lamp
you do it very comfortable to any door 


caution.
always middle switch dose not meet the same node

published 10 years ago

Kevlar9e

10 years ago

twould be nice but.

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