In Hong Kong Modern Compressed Air Work began in 1999 with the first Tunnel Boring Machine(TBM) employed in a railway project. Today,TBM can build tunnel diameter range from 6 to 21 *** boring machines are used as an ...
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In Hong Kong Modern Compressed Air Work began in 1999 with the first Tunnel Boring Machine(TBM) employed in a railway project. Today,TBM can build tunnel diameter range from 6 to 21 *** boring machines are used as an alterna-
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