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| zulässige Höchstkonzentration von Schadstoffen | |||
| höchstzulässige Schadstoffkonzentration (на рабочем месте) | |||
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предельно допустимая концентрация вредных веществ : 1 phrase in 1 subject |
| Sewage and wastewater treatment | 1 |
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