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/7b7fa0b2ef1faf40b8e784773eb5e0139cb973636d13399ce820e44873cd2c6b?s=96&d=mm&r=g 23 July 2021 23 August 2021