E21D 9/0607

The shield being provided with devices for lining the tunnel

Official title: {the shield being provided with devices for lining the tunnel, e.g. shuttering (E21D9/0873, E21D9/0879 take precedence; tail sealing means used as end shuttering E21D9/0635)}

E21D9/0607 (The shield being provided with devices for lining the tunnel) appears on 23 US grants and 10 published applications in this corpus.

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