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The operation, highlighting matters, reasons and treatments of unusual phenomena of hydrogen chloride column in VCM fractionating unit during trial run are described in detail, and suggestions on future normal operation are also proposed. 详述试车期间VCM精馏单元HCl塔的操作及注意事项、异常现象的原因及处理方法 ,并对今后的正常开车提出建议
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