The general procedures for constructing subway are as follows: first excavate the shaft, then horizontal pass, finally ingate.
地铁施工中一般采取先竖井继而横通道后开马头门进行正线施工的施工工序。
The general procedures for constructing subway are as follows: first excavate the shaft, then horizontal pass, finally ingate.
地铁施工中一般采取先竖井继而横通道后开马头门进行正线施工的施工工序。
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