English to French Tech/Engineering Engineering (general) pit and lagoon cleaning

The Hydrodozer is a mechanical sludge removal equipment that is made in various sizes depending on the application. It is designed in component form to be able to go through an 18” manway. **The tracks** can be used to agitate the sludge and a large blade will feed the pump section.

Je ne vois pas trop en quoi consiste le mécanisme...

Merci