以下为句子列表:
英文: The proposed modification involves reducing the heights of the ventilation shaft, changing the direction of the discharge from sideways to upward, and installation of silencers for ventilation shafts N1 and S1.
中文: 建议进行的改善工程,包括降低通风井的高度、把侧向的排气口改向上,以及为通风井N1及S1加装灭声器。
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