Most tunnel boring machines operating simultaneously in a single project

Most tunnel boring machines operating simultaneously in a single project
Who
JSC Mosinzhproekt
Where
Russian Federation (Moscow, Russian Federation)
When
The most tunnel boring machines operating simultaneously on a single project is 23 achieved by JSC Mosinzhproekt (Russia) in Moscow, Russia on 18 March 2020.
The tunnel boring machines were used in a Moscow metro project.