bleed valves, drain valves
Fermez les purges principales.
Close the main drain valves.
— Le Bateau (1981)
Parez purges principales.
Ward off major purges.
Fermez les purges.
Close the drain valves.
En position aux purges.
In position at the purge points.
Purges fermées.
Closed purges.
Purges principales ouvertes.
Main purge valves open.