thumb|250px|Pneumatic (compressed-air) fireless locomotives like this were often used to haul trains in mines, where steam engines posed a risk of explosion. This one is preserved [[H.K. Porter, Inc. No. 3290 of 1923.]]
thumb|250px|Pneumatic (compressed-air) fireless locomotives like this were often used to haul trains in mines, where steam engines posed a risk of explosion. This one is preserved [[H.K. Porter, Inc. No. 3290 of 1923.]]
Pneumatics (from Greek 'wind, breath') is the use of gas or pressurized air to create mechanical motion in mechanical systems.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).