Concrete used in water-retaining structures or exposed to weather or other severe exposure condition must be virtually（）or（）._精华吧

Concrete used in water-retaining structures or exposed to weather or other severe exposure condition must be virtually（）or（）.

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Concrete used in water-retaining structures or exposed to weather or other severe exposure condition must be virtually（）or（）.

正确答案：impermeable watertight

Tag：材料概论时间：2022-01-18 21:17:50

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