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| 美《空气清洁法》; 美空气清洁法 | |||
| 清洁空气法案 | |||
| 大气污染禁令 | |||
| 美国清洁空气法案 | |||
| 空气净化法; 空气清洁法 | |||
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| 净化空气法 | |||
| 净化空气作用 | |||
| 空气洁净法 | |||
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| 清洁空气法 | |||
| English thesaurus | |||
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| CAA (The CAA addresses and regulates airborne pollution that may be potentially hazardous to public health or natural resources) | |||
| CAA (from Environmental Protection Agency) | |||
| CAA (EPA) | |||
| CAA | |||
| Clean Air Act: 4 phrases in 4 subjects |
| Automobiles | 1 |
| Environment | 1 |
| Metallurgy | 1 |
| Technology | 1 |