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| Petrow-Kontakt m (Desinfektionsmittel; wird durch Bearbeitung von Erdöl mit rauchender Schwefelsäure gewonnen) | |||
| Kontaktsubstanz nach Petrow; Petrow-Kontakt m | |||
| контакт Петрова: 4 phrases in 1 subject |
| Oil / petroleum | 4 |
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