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日本三菱重工公司神户造船所建成世界最大的双隧道盾构掘进机，将于1993年6月在日本东京都就地安装，用于近海工程建设。该机系由两台隧道掘进机作左右或上下组合并同时工
The world’s largest twin-tunnel shield boring machine built by Japan’s MHI Kobe Shipbuilding will be installed on-site in Tokyo, Japan in June 1993 for offshore construction. The machine by the two tunnel boring machine for the left and right or up and down combination and work at the same time