中国国产最大直径盾构机在河南郑州下线

Published Sep 15, 2026 08:50 UTC |

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What the source reports

中新社郑州9月15日电 (王佳宁)中国迄今为止自主研制的最大直径盾构机“中铁1662号”15日在河南郑州下线。

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