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某水库左岸供水隧洞工程，于１９９１年发生了衬砌爆裂等严重事故。本文将介绍这一事故的简况，并重点分析其产生的原因。
The left bank of a reservoir water supply tunnel project, in 1991 occurred lining burst and other serious accidents. This article will introduce the accident briefing, and focus on the analysis of the causes.