trace metal element

基本解釋

This paper makes a survey of trace metal element of human hair with FAAS.
運用火焰原子吸收光譜法（FAAS）測定人發(fā)中微量金屬元素。
The mass and trace metal element contents in the plant had to be measured in grade estimation of farm enviroment.
植株金屬元素含量是農(nóng)田環(huán)境質(zhì)量評價中的必檢項目。
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.
文章從鑄鐵的化學成分、微量元素、孕育處理及金屬型的熱交換方面敘述了產(chǎn)生白口的原理及防白口的有效方法。