无机矿物质在金属表面高速滑行时，其刮削作用也不小。

Inorganic minerals in the metal surface high-speed taxi, scraping effect is also not small.

youdao

无机矿物质在金属表面高速滑行时，其刮削作用也不小。

Inorganic minerals in the metal surface high-speed taxi, scraping effect is also not small.

youdao