environmental engineer tests water reservoir person gloves collect sample test tube clear liquid splashes |
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| navigate by keyword : water reservoir quality test testing analysis sample environmental engineer laboratory pollution eco ecology nature protection clean research science clear liquid drop splash hands gloves treatment plant background industry waste contamination health safety chemical technician hydro aqua purity purification tech management resource supply river lake pond ocean sea source environment |
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| Environmental engineer tests water reservoir. Person in gloves collect water sample in test tube. Clear liquid splashes. Background water treatment plant, pollution eco concept. AI generated |
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