AIM: To examine the suitable depth and the element composition of the reaction layer of the Ti-porcelain.
目的：检测钛瓷反应层适宜厚度及元素构成。
The element composition and the group content of lignin are different if it prepares by the different methods.
不同方法制备得到的木质素产品，元素组成及官能团含量是不同的。
The element composition and mature of kerogen is an important distinguish mark between great and small scale carlintype gold deposits.
干酪根的元素组成和成熟度是判别大型卡林型金矿床和小型卡林型金矿床或矿点的重要标志。
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