发生事故的原因是设备维修人员错误更换零部件造成的。
The cause of this accident is the mistake on changing parts by maintenance worker.
本文简单介绍渔船发生事故的原因，搜寻和救助渔船的方法。
This paper briefly introduce fishing boats in the cause of the accident, search and rescue vessels approach.
介绍了液氯的生产原理及工艺过程，分析了在液氯生产和使用过程中发生事故的原因。
Production principles of liquid chlorine and its process were introduced. The reasons of accidents happened in production and application process of liquid chlorine were analysed.
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