In the view of the concrete's minute construction, cement and mortar encircled bone, there is tiny crack on interface of bone and mortar under temperature load.
从混凝土组成的细观角度出发，研究水泥砂浆包围的骨料，在温度荷载作用下首先在骨料与砂浆的界面上产生界面微裂缝。
Its a needle in a haystack and it can take a minute for the crack to be completed or maybe days.
犹如在大海里捞针，这也许几分钟就能破解，或者是需要好几天。
After first crack ends there is usually a period of about one minute before second crack begins.
在一爆结束后，一般有个阶段大概有1分钟，是在二爆前。
After first crack ends there is usually a period of about one minute before second crack begins.
在一爆结束后，一般有个阶段大概有1分钟，是在二爆前。
应用推荐