英文關鍵字
accident
acid
bottle
broken
business
car
caused
chemical
chemistry
clean
container
corrosive
damage
danger
death
destroy
dirty
down
environment
equipment
factory
fall
floor
forklift
glass
ground
health
industry
infected
laboratory
leak
liquid
oil
old
poison
power
product
protection
reaction
risk
safety
science
service
stain
symbol
toxic
warn
waste
water
work