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| 水净化条例; 清洁水法 | |||
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| 美国清洁水法案 | |||
| 水体清洁法; 清洁水法令; 流水保护条例 | |||
| English thesaurus | |||
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| CWA (Federal law that regulates the discharge of toxic and nontoxic pollutants into the surface waters of the United States; 1972) | |||
| CWA (from Environmental Protection Agency) | |||
| CWA (EPA) | |||
| CWA | |||
| clean water act: 9 phrases in 2 subjects |
| Technology | 7 |
| Water resources | 2 |