The author described philosophy, causes and precautions for water hammer appearance in steam piping, drum, feedwater piping, economizer, drum draining tube, sub-steam cylinder etc.
叙述了蒸汽管道、锅筒、给水管道、省煤器。锅筒放水管、分汽缸等发生水冲击的基本原理，产生原因和预防措施。
Normally, The principle of sub-serial repairing is applied to engine cylinder maintenance in automotive industry.
分系列修复的原则一般用于汽车行业中的发动机缸体维修。
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