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mechanical pollution | |||
mechanical impurity (присутствие взвешенных частиц в воде) | |||
mechanical impurity mechanical pollution | |||
mechanical impurity |
механическое загрязнение : 4 phrases in 4 subjects |
Construction | 1 |
Electrical engineering | 1 |
Makarov | 1 |
Pharmacy and pharmacology | 1 |