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link 19.10.2010 8:58 |
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Subject: ahead of the advancing tunnel drive dril. Fissure grouting (for water inflow) ahead of the advancing tunnel drive, particularly but not limited to TBM excavations, shall be undertaken when water inflows to the tunnels exceed the limits given in Section 3.3.16.16 of this Specification. Пожалуйста, помогите перевести ahead of the advancing tunnel drive Спасибо! |
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