We found one dictionary that defines the word oleopneumatic:

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1. oleopneumatic: Wiktionary

Definitions from Wiktionary (oleopneumatic) ▸ adjective:  Relating to oil and air. ▸ Words similar to oleopneumatic ▸ Usage examples for oleopneumatic ▸ Idioms related to oleopneumatic ▸ Wikipedia articles (New!) ▸ Popular nouns described by oleopneumatic ▸ Words that often appear near oleopneumatic ▸ Rhymes of oleopneumatic ▸ Invented words related to oleopneumatic