American trivalent vaccine.
美国三联疫苗
black trivalent chromium electroplating.
三价黑铬电镀
Trivalent arsenic was more clastogenic than pentavalent arsenic.
三价砷的致染色体畸变作用大于五价砷。
a bivalent and trivalent metallic element of the rare earth group.
稀土属二价和三价金属元素。
Trivalent chromium plating can be divided into chloride and sulfate systems.
三价铬电镀分为氯化物体系和硫酸盐体系。
One means of accomplishing this end is to add trivalent cations to the water.
实现这一目的的一种方法是将三价阳离子加入水中。
The plating process involves trivalent chrome passivation,and so is free from Cr 6.
在电镀过程涉及的三价铬钝化，所以是免费的由铬。
A trivalent metallic element of the rare earth group, it could occurs with yttrium.
稀土属三价金属元素，可以与钇共生。
The chromium deposition velocity of trivalent chromium electroplating was researched.
对三价铬电解液镀铬的沉积速度进行了实验研究。
Chromium is widely distributed in nature, organisms mainly trivalent form of chromium.
铬在自然界中广泛分布，生物体中主要以三价铬的形式存在。
Galvanized to trivalent chromium and hexavalent chromium passivation passivation process.
镀锌为三价铬钝化及六价铬钝化工艺。
The development history of trivalent chromium passivation for zinc plating was overviewed.
概述了镀锌三价铬钝化的发展历程。
The major advantages and disadvantages of trivalent chromium electroplating were introduced.
介绍了三价铬镀铬的主要优点与缺点。
A Study on Reducing Reaction of Creating Trivalent Cr for Cr Electroplating from Hexavalent Cr
以六价铬还原作铬源的三价铬电镀工艺的研究
A trivalent metallic element of the rare earth group; usually occurs in association with yttrium.
一种稀土属的三价金属元素，通常与钇共生。
Trivalent chromium passivation shall be used unless written exception or specification update provided.
要应用三价铬的钝化，有书面指出的例外或规格更新时除外。
White passivating liquor trivalent chromium for zinc plating is prepared based on a new chemical formulation.
镀锌三价铬白色钝化液是由一种新得化学配方制得。
Observation on Polio Vaccine Virus Excretion in Immunized Infants Given First Dose Trivalent Oral Polio Vaccine
婴儿接种首剂三价口服脊髓灰质炎疫苗后
Effects of Trivalent Chromium from Different Source on Carcass Composition and Lipid Metabolism in Finishing Pigs
不同形式三价铬对肥育猪胴体组成和脂肪代谢的影响
Minimum 5 years experience in electroplating of metal parts, with at least 1 year focusing on trivalent chromium plating.
最少5年金属零部件电镀工作经验, 至少1年三价铬电镀经验
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