为避免光缆阻断带来的巨大损失，本文设计完成了一个光纤故障快速检测光路自动切换系统。
In order to avoid immense loss for optical cable break, a quick fault detection and optical path automatic switching system is designed and realized.
碳二加氢反应器的切换是乙烯装置运行过程中的重大操作工序，而离线切换会造成乙烯产品的大量损失。
During the operation of ethylene plant, off - line switch of acetylene converter will lead to great loss in ethylene production.
特别是在产品牌号切换过程中会产生大量的不合格料，带来了经济上的损失。
Especially during grade transition, a lot of off-specification polypropylene are produced and leads to loss of profits.
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