The interface between new and old concrete is often weak.
新老混凝土界面往往是混凝土结构的薄弱界面。
Old concrete surface must be cleaned by water and then coated.
旧的混凝土面必须先用清水冲洗干净，晾干后涂刷。
General measures of interface between new and old concrete throughout the world were studied.
研究了国内外新老混凝土结合面一般采取的措施。
It was an odd combination of elegant old wooden buildings and new three-story reinforced-concrete buildings.
疗养院是高雅陈旧建筑物和新的三层钢筋混泥土建筑的奇异结合。
It was an odd combination of elegant old wooden buildings and new three-story reinforced-concrete buildings.
疗养院是高雅陈旧建筑物和新的三层钢筋混泥土建筑的奇异结合。
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