The invention has simple, fast and effective test method, low cost and short research and development period.

本发明具有试验方法简单、快速、有效，且成本低、研发周期短的特点。

youdao

The invention has simple, fast and effective test method, low cost and short research and development period.

本发明具有试验方法简单、快速、有效，且成本低、研发周期短的特点。

youdao