attention
background
beware
building
careful
caution
china
clean
danger
dangerous
fall
floor
hazard
hazardous
indoors
information
injury
janitor
lobby
maintenance
mistake
mopping
notice
peril
plastic
precaution
prevent
prevention
progress
public
risk
safety
service
sign
signal
skid
slip
slippery
symbol
tiles
warning
wet
yellow