Functionally Gradient Material is a new concept and idea developed by the Japanese scientists five years ago.

梯度功能材料是日本科学家于五年多以前提出的新设想和新思想。

youdao

Functionally Gradient Material is a new concept and idea developed by the Japanese scientists five years ago.

梯度功能材料是日本科学家于五年多以前提出的新设想和新思想。

youdao