The temperature crack in brick mix building is a common fault in the engineering. This text analyzes this cause by calculating and sums up some Precautionary measures.
砖混住宅楼温度裂缝是工程中常见的通病，通过理论计算定量地分析出其中的原因，并总结出其预防措施。
The article introduces some common fault phenomena of the CA8020 type double oscillograph working and the reasons which cause them provides the measurement of the key and the methods of repair.
介绍CA8020型双踪示波器的常见故障现象及其产生的原因，给出了关键点测量数据和故障处理方法。
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