...
But i notice most train now , fire extinguisher is kept inside
the same cabinet but no glass door , it is change into a metal door
, with a fire extinguisher logo above it , and the door is locked with 2
keyhole.
I wonder in case of emergency, how people can gain acess to the
extinguisher. Can anyone enlighten me ?
Wow! I guess to prevent abuse, theft, misuse, the metal door can
only be open by the train driver, who holds one key, and the
station master, who holds the other key, and they must open
it together, like safe deposit boxes.

I hope you are enlightened now.