英文關鍵字
acid
analysis
bottle
chemical
chemicals
chemistry
closeup
container
corrosion
corrosive
danger
dangerous
destroy
disease
environment
factory
glass
hazard
hazardous
health
hydroxide
industrial
industry
infection
information
koh
lab
label
laboratory
manufacturing
material
object
poison
potassium
product
protect
reaction
research
risk
safety
scar
science
scientific
substance
substances
symbol
tag
warn