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。

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The research on adherence of the new-to-old concrete has become profound significance.

对新老混凝土的粘结问题的研究具有深远的现实意义。

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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。

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Wak isn't much to look at: a few potholed streets with 30-year-old concrete homes of German design.

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It skillfully incorporates the upgraded services that could not be threaded through the old solid concrete walls.

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Beyond that the 49-year-old actress has no concrete plans.

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