concrete for buried culvert extension
扶壁式挡墙砼: concrete for counterfort retaining wall 暗涵接长砼: concrete for buried culvert extension 封头砼: concrete for end plate cover ..
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concrete for buried culvert extension
地下涵洞扩建用混凝土
以上为机器翻译结果，长、整句建议使用 人工翻译 。