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| waste water disposal (Collection and removal of wastewater deriving from industrial and urban settlements by means of a system of pipes and treatment plants; Сбор и удаление сточных вод из промышленных или городских районов через систему труб и очистных сооружений) | |||
| reclamation of sewage; utilization of sewage; wastewater reuse | |||
| waste water disposal (Yeldar Azanbayev) | |||
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| sewage disposal | |||
| утилизация сточных вод: 4 phrases in 2 subjects |
| Karachaganak | 3 |
| Makarov | 1 |