ppb造句

1、Add 25 ppb Bentonite and allow to hydrate for a minimum of 6 hrs
按每桶钻井液加25磅的膨润土，允许水化至少6个小时。

2、DETERMINATION OF ppb LEVEL Ag,Cd,Pb,Au,Bi AND Cu BY FLOTATION-FAAS
浮选-原子吸收法连续测定ppb级银、铅、镉、金、铋、铜

3、All drill water to be pretreated with 2 ppb Gluteraldehyde.
所有的钻井水都要按每桶加两磅的戊二醛作预处理。

4、Add 25 ppb Bentonite and allow to hydrate for a minimum of 6 hrs.
按每桶钻井液加25磅的膨润土，允许水化至少6个小时。

ppb翻译