trace metal element

基本解释

This paper makes a survey of trace metal element of human hair with FAAS.
运用火焰原子吸收光谱法（FAAS）测定人发中微量金属元素。
The mass and trace metal element contents in the plant had to be measured in grade estimation of farm enviroment.
植株金属元素含量是农田环境质量评价中的必检项目。
From the chemical composition, trace element, inoculation and thermal exchange of metal mold casting, the principle of chill formation and the effective methods for preventing chill were studied.
文章从铸铁的化学成分、微量元素、孕育处理及金属型的热交换方面叙述了产生白口的原理及防白口的有效方法。