煤焦油替代重油在切换和使用过程中，抓好几个关键点，确保玻璃质量，降低生产成本。
When coal tar is used or replaces heavy oil as fuel some critical notes must be focused on its application so as to insure glass quality and reduce production cost.
另一方面他们需要降低生产成本，缩短交货期和降低库存水平以确保盈利能力。
On the other hand, they need to reduce production cost, shorten lead time, and lower inventory level to ensure profitability.
为保证产品质量、降低生产成本和确保工程安全，对落砂铸件进行缺陷在线检测具有非常重要的实际意义。
To ensure the product quality, reduce the costs and guarantee the engineering safety, it has very important practical significance to online monitor the defects of castings.
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