The production technique of said briquet is reliable, its process is simple and raw material resource is secure. Besides, it has the condition of continuously industrial production.

该种型煤技术可靠、工艺简单，原料来源有保证，具备连续性工业生产条件。

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Coal tar coating has been used as the material for corrosion prevention for its good stable physical and chemical properties which has a large range of raw material resource and low price.

煤焦油瓷漆具有优良的物理化学性能和稳定的防腐性能，而且原料来源广，价格低廉，近生来又开始在我国管道防腐中应用。

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Usage charging means billing a client or department based on system resource, system administrator time, or raw material (for example, printer paper) usage.

使用收费表示根据客户或部门对系统资源、系统管理员时间、或者原始材料(例如，打印纸)的使用情况进行收费。

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