每隔一段时间启动引擎和加热器。
采用SQG系列清管机消除一段分解加热器列管中垢层，收到了意想不到的效果，具有显著的经济效益和社会效益。
The use of series SQG tube cleaners for the removal of scale in tube array of heater for first stage decomposition gives unexpected results, with remarkable economic and social benefits.
尿素生产中的一段分解加热器列管内的垢层，直接影响到产品的产量、质量和消耗。
Scaling in tube array of heater for first stage decomposition in urea production has a direct bearing on the output and quality of the product and consumption.
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