An engineer controlling a quality of water ,aerated activated sludge tank at a waste water treatment plant. pollution
Schlüsselwörter
aeration,
controlling,
ecology,
engineer,
equipment,
example,
factory,
hard hat,
helmet,
horizontal,
industry,
male,
man,
microbiology,
one man only,
outdoors,
people,
pipe,
pollution,
protective clothing,
quality,
quality control,
sewage,
storage tank,
tank,
test tube,
waste,
water,
water treatment plant,
men at work,
working,
working out
Deutsch
