ppb
abbr. (美)十亿分之一(Parts Per Billion)
例句
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。
Abstract: the existence of chlorophenol compounds in water volume reaches PPB concentration that there will be a stench.
摘要:氯酚类化合物在水中的存在量达到ppb浓度时即会出现明显的恶臭味。
In original English language for the 1st impression. The Net Price to the Publisher is at the ratio 1.6 of the PPB cost.
原书第一次印刷的文字形式是英文。出版者支付的净价依据PPB成本1.6的比率计算。