treated water flowing thru a weir in a sedimentation trank in a waste water treatment plant
Schlüsselwörter
background,
blue,
concrete,
ecology,
environment,
environmental,
flow,
foam,
industrial,
industry,
plant,
pollution,
duck pond,
reusing,
recycling,
sewage,
steel,
structure,
tank,
treatment,
waste,
water,
weir
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