| LC control no. | sh 85120461 |
|---|---|
| LC classification | TD745 TD758.5 |
| Topical heading | Sewage--Purification |
| Variant(s) | Effluent treatment Purification of sewage Sewage--Disinfection Sewage treatment Water treatment |
| Found in | UMI business vocab. (Effluent treatment, use Water treatment) |
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