hardness number conversion

例句：

1. 1. The engineer must convert the hardness number to a more manageable form for the customer.
   工程师必须将硬度数转换为客户更容易管理的形式。
2. 2. During the conversion of the old system, we encountered several technical issues that needed to be resolved.
   在旧系统的转换过程中，我们遇到了几个技术问题，需要解决。
3. 3. The conversion of the data from one format to another is essential for accurate analysis.
   数据从一种格式转换到另一种格式是准确分析所必需的。