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Tag: tunnel
Death on the way to the treasure An unauthorized digger died in a 70-meter tunnel
The collapse of an unauthorized drilling tunnel led to the death of…
The national geomechanics map of the rock mass of the country will be compiled within the next year – RCO News Agency
According to Mehr news agency, citing the country's geological and mineral exploration…
China is the first country with a powerful supersonic wind tunnel in the world
With the JF22 wind tunnel, China now has the most powerful supersonic…