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Ostwald process
[ar] عملية أوستفالد
[ca] Procediment Ostwald
[da] Ostwald-processen
[de] Ostwald-Verfahren
[es] Método de Ostwald
[fa] فرایند استوالد
[fr] Procédé Ostwald
[he] תהליך אוסטוולד
[hi] ओस्टवाल्ड प्रक्रिया
[hr] Ostwaldov proces