第一和第二硬毛束分别与该第一和第二区相接触并且大致覆盖在该区上。

First and second bristle packets contact and generally cover, respectively, the first and second areas.

youdao

第一和第二硬毛束分别与该第一和第二区相接触并且大致覆盖在该区上。

First and second bristle packets contact and generally cover, respectively, the first and second areas.

youdao