Water treatment engineer using electronic sensor to test water quality
Schlüsselwörter
outdoors,
day,
industry,
science,
technology,
occupation,
engineering,
boat,
happiness,
us,
hunt,
engineer,
mark,
research,
electronic,
photo,
meter,
sample,
testing,
reservoir,
north america,
maine,
portland,
one person,
vertical,
holding,
river,
smiling,
color image,
water,
caucasian appearance,
sensor,
turbidity
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