PPB

基本解釋

Add 25 ppb Bentonite and allow to hydrate for a minimum of 6 hrs.
按每桶鑽井液加25磅的膨潤土，允許水化至少6個小時。
All drill water to be pretreated with 2 ppb Gluteraldehyde.
所有的鑽井水都要按每桶加兩磅的戊二醛作預(yù)処理。
The detection limit for surface waters is 0.05 ppb U .
檢出下限爲(wèi)0.;05ppb;
For ISSR marker, 34 polymorphic bands were generated, PPB were 53.0%.
ISSR引物共擴增到34條清晰的多態(tài)性條帶，多態(tài)性條帶比率爲(wèi)53.;0%25。
In original English language for the 1st impression.The Net Price to the Publisher is at the ratio 1.6 of the PPB cost.
原書第一次印刷的文字形式是英文。出版者支付的淨(jìng)價依據(jù)PPB成本1.;6的比率計算。