boilers的例句（boilers在句子中的用法）

• The paper analysis the speciality of design calculation a boiler collocating air - preheater other two boilers needed. 分析了一台锅炉加挂其它两台锅炉所需 空预器 设计计算的特殊性,提出了有效的计算方法.
• The clean coal is sent to a crusher and the boilers. 干净的煤送入破碎机和锅炉.
• Conversely, test made in full - scale boilers are usually difficult to reconcile. 与此相反, 在工业规模的锅炉内所做的试验,也难于互相一致.
• Make sure that all gas fires and central heating boilers are serviced annually. 确保所有的煤气取暖器和中央供暖的锅炉每年都检修一次。
• Most boilers have a lifespan of 15 to 20 years. 绝大多数锅炉有15至20年的使用期限。