The programme of "front benching pilot tunnel divisional and laminated skewed slot construction" was created.
独创了“正台阶导硐分部分层斜沟施工案”,该案具有良好的推广应用价值。
The programme of "front benching pilot tunnel divisional and laminated skewed slot construction" was created.
独创了“正台阶导硐分部分层斜沟施工案”,该案具有良好的推广应用价值。
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