The unforeseen intense heat generated by the high quality concrete, grade bn.550 and bn.450, was overcome by cooling with inlaid cold water pipes.
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美
释义
事先没有预料到标号为BN550和BN450的优质混凝土会产生很高的温度,后来采用内嵌冷水管冷却解决了这一问题。
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