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.

　
英 美
  • 事先沒(méi)有預料到標號為BN550和BN450的優(yōu)質(zhì)混凝土會(huì )產(chǎn)生很高的溫度,后來(lái)采用內嵌冷水管冷卻解決了這一問(wèn)題。
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