26 June 2006

Positive Pressure

Last week while I was taking the MRT home at HarbourFront MRT station, I saw this stuck on the glass doors at the ends of the platform:

I'm pretty certain in all the time that the room (which is probably referring to the platform itself) has been in existence, it has always been having positive pressure. Having zero or negative pressure in the platform is rather unfathomable.

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