In Belgium method of tunnelling?

Construction of side walls is completed before invert and roof arch are built
Construction of roof arch is completed before side walls and inverts are built
Construction of invert is completed before side walls and roof arch are built
Construction of invert and side walls is completed before roof arch is built

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Answer: Option 2

4 views Answered 2022-09-01 13:21

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