Study on Trivalent Chromium Electroplating Process in Chloride System;
氯化物体系三价铬电镀工艺研究
Corrosion resistance comparison of trivalent chromium passivation film on zinc based on different zinc plating processes;
不同镀锌层的三价铬钝化膜耐蚀性能比较
The effects of the components of trivalent chrome passivation bath on the appearance and corrosion resistance of the passivating film are investigated.
研究了三价铬黑色钝化液组分对钝化层外观和耐蚀性的影响。
The bath compositions of trivalent chrome black passivation for zinc plating coating were optimized by orthogonal test method and the effects of operation conditions on the appearance and the corrosion resistance of the passivation film were investigated.
采用正交试验法对镀锌层三价铬黑色钝化工艺组分进行优化,研究了工艺参数对钝化膜外观和耐蚀性的影响。
The bath compositions of trivalent chrome black passivation for zinc-iron alloy coating were optimized by orthogonal test method.
采用正交试验法对锌-铁合金镀层三价铬黑色钝化工艺进行优化,并研究了工艺参数对钝化膜外观和耐蚀性等影响。
By using the methods of documentary,interview and questionnaire,the author devises the cooperative teaching and three-dimension evaluation, and tests it through experiment.
通过文献资料分析、走访和问卷调查等 ,设计了“合作教学、三维评价”方法 ,通过教学实验检验。
Having a valence of3 or higher.
三价的具有三价或更高价的
Having valence3.
三价的化合价为3的
Of or containing trivalent nickel, Ni3+.
含三价镍的有或含三价镍的，Ni3＋
Study on the Reaction Promoted with Ga(OTf)_3 and Mn(OAc)_3·2H_2O;
三价镓及三价锰促进的有机反应研究
(chemistry) having a valence of three.
（化学）有三价原子的。
Of, relating to, or containing cerium, especially with valence3.
三价铈的属于、关于铈的或含铈的，尤指三价铈的
a trivalent radical derived from glycerol by removing the three hydroxyl radicals.
一种三价基，由丙三醇去掉三个羟基获得。
It is to reduce Eu3+ into Eu2+ with electrolyzation method.
采用电解的方法将三价铕还原成二价。
a bivalent and trivalent metallic element of the rare earth group.
稀土属二价和三价金属元素。
The Study of Mongolian Three Valents V.+V. Compound Verb;
蒙古语V+V三价复合动词配价研究
Evaluation on positive results in the determination of hexavalent chromium in trivalent chromium passivation coatings
三价铬钝化件六价铬检出阳性问题及其评价
costing 3 cents (US) or 2 pence (Britain).
价值三美分或两便士。
Our offer remains open for 3 days.
我们的报价三天内有效
and three months at four hundred and thirty-eight point five.
三个月远期价为438.5便士。
Milk costs 30p a litre.
牛奶每升价格三十便士。
This assessment of 30 per cent for mistakes and 70 per cent for achievements is just about right.
三七开的评价比较合适。
Our offers are good for 3 days.
我方报价三天有效。
A one-way trip costs 3 yuan.
地铁票价单程为三元，