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Selecting an efficient tunnelling system is one of the main objectives of any tunnel construction team to minimize tunnelling problems. The tunnelling system consists of a set of harmonized construction methods that are used for executing different tunnelling activities. This book introduces a computer based model, which is considered as an efficient and easy tool used in the preliminary stage of the project, for selecting efficient tunnelling systems based on technical and nontechnical conditions of the project.
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birth defects, or other reproductive harm.
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