酸洗废酸从()号酸罐通过废酸泵排至酸再生，新酸从酸再生通过酸泵供至()号酸罐。
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冷轧厂1780机组酸洗一段共设置()台酸泵，其工作制度为()台工作，()台备用。
带钢在酸洗工艺段的跑偏通过()号纠偏实现对中，其为()辊式，对中精度为()mm.
漂洗段共设置()台漂洗泵，其工作制度为()台工作，()台备用。
Which of the following is the best reason for pouring a condensation impression material as soon as possible()
A. the degree of polymerization of condensation polymers is initially high and then decreases with time
B. evaporation of a volatile by-product causes shrinkage ofthe set material
C. If left unpoured，condensation impression materials expand as they absorb water from air
D. condensation polymers will start to react with the polymer of the impression tray and cause distortion
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