what lining is on the walls of the shaft? precast, shotcrete, cast in-situ?
sonofmoresby 1 month ago
where was this filmed?
kennymagnum 1 year ago
what lining is on the walls of the shaft? precast, shotcrete, cast in-situ?
sonofmoresby 1 month ago
where was this filmed?
kennymagnum 1 year ago