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英文關鍵字
graphic
sign
label
liquid
risk
oil
danger
protection
care
dangerous
hazard
industrial
banner
symbol
explosion
smoke
industry
hot
emergency
burn
fire
flame
heat
fuel
material
chemical
safety
security
protect
forbidden
highly
warning
chemistry
gas
alarm
safe
no
match
caution
restricted
flammable
alert
beware
accident
notice
hazardous
petroleum
zone
petrol
allowed