This wall had a dry composite strength of 4.5 megapascal.

该墙的干复合强度为 4.5 兆帕。

In fact, it has a dry composite strength of 6.5 megapascal, as compared to a normal fired-brick, which just has 3 to 3.5 megapascal.

事实上，它的干复合强度为 6.5 兆帕，而普通耐火砖的干复合强度仅为 3 至 3.5 兆帕。