单词ppb
abbr.: (=parts per billion)十亿分之一
网络: 十亿分率；十亿分之几；十亿分之一浓度
十亿分之一
The presence of inclusions and developed prior particle boundaries (PPB) damage mechanical properties and service life of HIP disk.
PPB（原始粉末颗粒边界）和夹杂物等缺陷对盘件的性能和使用寿命不利，必须予以消除。
Objective: To assess the PPB rate and outcome and identify risk factors associated with PPB in patients taking clopidogrel.
目的：评估服用氯吡格雷病人PPB的发生率，结果以及相关的危险因素。
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。
The Model 220 GF accessory is the latest technology in PPB level analyses by graphite furnace AA.
型石墨炉配件采用PPB同阶段分析的最新的技术。
Blood levels of toxaphene residues plateaued at 40 ppb, adipose levels at approximately 4000 ppb.
血液中的毒杀芬残留量平稳在40浓度，脂肪含量约4000浓度。
Food and water all contain lead. Currently, the EPA allows 15 ppb of lead in your drinking water.
食品和水同样含铅，如今，美国环保署允许饮用水的含铅量是15PPB。
Study on flow-injection spectrophotometric determination of ppb level silicate in boiler water and feedwater in thermal power plant
基于流动注射分析技术快速测定电厂汽水中痕量硅酸盐的研究
Research on Spectrophotometric Determination of ppb-level Chloride in Boiler Water at Power Plants Based on Flow injection Analysis
流动注射-分光光度法测定电厂炉水中微量氯离子的试验研究
Record readout in ppb after 60 seconds
60秒后记秒后记录测定结果