hard spectrum analysis

• 铁谱分析

hard spectrum analysis的用法和样例：

例句

1. In this paper the ferrography analysis technology is briefly introduced.
   本文简介了铁谱分析技术。
2. Change law of friction polymer in running diesel engine lubricating oil was studied by using Fe spectrum analysis technology.
   运用铁谱分析技术，研究在用柴油机润滑油中摩擦聚合物的变化规律。