The article describes the tunnel boring machine as the `earthbound submarine`. Funny.
https://www.rtands.com/track-construction/track-structure/bridges-tunnels/montreal-light-rail-project-uses-submarine-to-bore-through-sensitive-area/
Montreal light rail project uses a 'submarine' to bore through sensitive area; the machine evacuated more than 300,000 tons of material.
https://www.rtands.com/track-construction/track-structure/bridges-tunnels/montreal-light-rail-project-uses-submarine-to-bore-through-sensitive-area/
Montreal light rail project uses ‘submarine’ to bore through sensitive area
www.rtands.comMontreal light rail project uses a 'submarine' to bore through sensitive area; the machine evacuated more than 300,000 tons of material.