Tap water samples for analysis. Selective focus.
Schlüsselwörter
analysis,
water,
test,
research,
sample,
chemical,
hand,
quality,
exam,
pollution,
faucet,
experiment,
tap,
home,
chemistry,
control,
scientist,
flask,
laboratory,
holding,
health,
aluminium,
pollutant,
soft,
turbidity,
ampoule,
men at work,
background,
researching,
plumbing,
probe,
liquid,
iron,
arsenic,
hard,
bleach,
exam,
cles,
disinfection,
dirty,
closeup,
composition,
cold
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