The tunnel is a concealed work, its design and the construction faces the gneiss.
隧道是一项隐蔽工程,其设计和施工面向的对象是岩土体。
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Decorative Material for Substructure Work and Tunnel& Kail Enameled Pressed Steel
地下工程与隧道内装饰材料&开尔搪瓷钢板
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由于设计、施工、地质条件和隧道结构本身的原因,高速公路隧道在建成后需要进行管理,产生病害的隧道需要进行加固;
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Decorative Material for Substructure Work and Tunnel - Kail Enameled Pressed Steel
地下工程与隧道内装饰材料-开尔搪瓷钢板
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In the last stage of mining deep-seated 23 ~ # right No.1 work-face, tunnel length is different.
杏花煤矿133综采队,在回采深部23 # 右一采面末期, 上下巷不等长.
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