一个毛的质量样本好混合，减少四分取样法适当的数量。

A gross quality samples were completely mixed and reduced by coning quartering to appropriate quantities.

youdao

一个毛的质量样本好混合，减少四分取样法适当的数量。

A gross quality samples were completely mixed and reduced by coning quartering to appropriate quantities.

youdao