Fiber ball filter material is mainly concentrated in water treatment and oil industry.

纤维球滤料的应用主要集中在水处理和石油行业。

youdao

There is a big oil ball on the surface of yolk-sac of perch.

胚胎卵黄囊表面有一个大圆形油球。

youdao

General signing pen, oil pen, ball pen.

普通签字笔，油性笔，圆珠笔。

youdao

General signing pen, oil pen, ball pen.

普通签字笔，油性笔，圆珠笔。

youdao