Outfall Tunnel TBM Final Ring July 2021 V3

https://tgtunnelling.com/wp-content/uploads/2021/07/balfour2.jpg 800 436 ZJ ZJ https://secure.gravatar.com/avatar/4194a40e6e4fc8b4bc5cac41d2db8828?s=96&d=mm&r=g 23 July 2021 23 August 2021