• The invention relates to a protective device combined by fabricated explosion-protection wall and turnover road needle, belonging to the structure engineering field.

    发明装配式防爆翻转组合防护装置属于结构工程领域。

    youdao

  • The invention relates to a protective device combined by fabricated explosion-protection wall and turnover road needle, belonging to the structure engineering field.

    发明装配式防爆翻转组合防护装置属于结构工程领域。

    youdao

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