Worker opening valve in tank system of sewage treatment plant
Keywords
water,
sewage,
purification,
man,
engineer,
men at work,
waste,
industry,
factory,
filter,
clarification,
sewage treatment plant,
treatment,
plant,
recycling,
purified,
purity,
facility,
clean,
cleaning,
sludge,
tank,
pit,
basin,
environment,
ecology,
pollution,
environmental,
modern,
industrial,
dirty,
uniform,
occupation,
work,
opening,
turning,
wheel,
people,
person,
caucasian,
nobody