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Click the blue letter to pay attention to our large-scale urban construction craftsman documentary, which is on the 16th episode of the documentary, “Live Up to Today”, and on the 16th episode of the documentary, “Live Up to Today” (source: released in Xi’an).
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He said that in recent years, China has achieved fruitful results in the field of infrastructure construction. China has built the world’s largest expressway system and has the world’s longest
Except for the following circumstances: (1) the construction unit proposes to replace it due to non performance of post responsibilities or major work mistakes; （2） Unable to continue the management
However, the system is only opened in case of fire, and residents can not open it by themselves, nor can it solve the problem of normal ventilation in the corridor.