Which of the following methods of tunneling is used for long tunnels at great depths? Options: A . &nbspArmy method B . &nbspNeedle beam method C . &nbspAustrian method D . &nbspEnglish method

Which of the following methods of tunneling is used for long tunnels at great de

Question

Which of the following methods of tunneling is used for long tunnels at great depths?

Options:

A . Army method

B . Needle beam method

C . Austrian method

D . English method

Answer: Option C

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