inspection standards for glass bulbs for cathode-ray tubes 阴极射线管玻壳检验规范 instability in tension 拉伸失稳 installing form 安装形式 ..
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instability in tension detail 拉抻失稳
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Since its independence from France in 1960, Chad's history has been marked by instability and violence stemming mostly from tension between the mainly Arab-Muslim north and the predominantly Christian and animist south.
BBC: Chad: N'Djamena deaths as 'coup' foiled
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