Reducer and Reducing gear

Reducer noun - A substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver.

Reducing gear and reducer are semantically related in gear mechanism topic. In some cases you can use "Reducing gear" instead a noun "Reducer", when it comes to topics like gearbox, gear box, reduction gear.

Reducer and reducing gear are semantically related in gear mechanism topic. You can use "Reducer" instead a noun "Reducing gear", if it concerns topics such as gearbox, gear box, reduction gear.