MMD Sizers Perform Under Pressure to Create Chinese …
MMD Sizers Perform Under Pressure to Create Chinese Metro Lines. On 10 January 2021, CREG (China Railway Equipment Group) announced the completion of tunnelling for the new Dalian metro line, with its Tunnel Boring Machine system – incorporating an MMD Sizer – having created a 2,882m tunnel, including 2,310m under the sea.