composition controlling

• 成分控制

composition controlling的用法和样例：

例句

1. The application of portable on-site emission spectrometers for the fast composition control of a wide range of metals has been investigated by CRM.
   通过有证参考物质对便携式在线发射光谱仪在不同金属类别的快速成分控制的应用进行了考察。