The ultrasonic phased array system for monitoring the expanding of weld defect in steel bridge was researched.
研制了针对钢结构桥梁焊缝缺陷扩展的超声相控阵监测系统。
The most common and severe defect is the bridge cracking problem, which has seriously affected the normal usage of Bridges and become the urgent problem in the engineering field.
其中最为普遍和严重的便是桥梁裂缝问题，已经严重影响了桥梁的正常使用，成为工程界亟待解决的问题。
Objective: To discuss the reasons of failure of ceramic resin-bonded bridge repair the cases of dentition defect.
目的：分析烤瓷粘接桥修复牙列缺损失败及引起并发症的原因。
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