Preparation of coating microscopic sample is very difficult than general metal material.

与一般金属材料不同，金属镀层金相试样制备的技术难度要大得多。

youdao

Preparation of coating microscopic sample is very difficult than general metal material.

与一般金属材料不同，金属镀层金相试样制备的技术难度要大得多。

youdao