Study on Trivalent Chromium Electroplating Process in Chloride System;
氯化物體系三價鉻電鍍工藝研究
Corrosion resistance comparison of trivalent chromium passivation film on zinc based on different zinc plating processes;
不同鍍鋅層的三價鉻鈍化膜耐蝕性能比較
The effects of the components of trivalent chrome passivation bath on the appearance and corrosion resistance of the passivating film are investigated.
研究了三價鉻黑色鈍化液組分對鈍化層外觀和耐蝕性的影響。
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.
采用正交試驗法對鍍鋅層三價鉻黑色鈍化工藝組分進行優(yōu)化,研究了工藝參數(shù)對鈍化膜外觀和耐蝕性的影響。
The bath compositions of trivalent chrome black passivation for zinc-iron alloy coating were optimized by orthogonal test method.
采用正交試驗法對鋅-鐵合金鍍層三價鉻黑色鈍化工藝進行優(yōu)化,并研究了工藝參數(shù)對鈍化膜外觀和耐蝕性等影響。
By using the methods of documentary,interview and questionnaire,the author devises the cooperative teaching and three-dimension evaluation, and tests it through experiment.
通過文獻資料分析、走訪和問卷調(diào)查等 ,設計了“合作教學、三維評價”方法 ,通過教學實驗檢驗。
Having a valence of3 or higher.
三價的具有三價或更高價的
Having valence3.
三價的化合價為3的
Of or containing trivalent nickel, Ni3+.
含三價鎳的有或含三價鎳的，Ni3＋
Study on the Reaction Promoted with Ga(OTf)_3 and Mn(OAc)_3·2H_2O;
三價鎵及三價錳促進的有機反應研究
(chemistry) having a valence of three.
（化學）有三價原子的。
Of, relating to, or containing cerium, especially with valence3.
三價鈰的屬于、關于鈰的或含鈰的，尤指三價鈰的
a trivalent radical derived from glycerol by removing the three hydroxyl radicals.
一種三價基，由丙三醇去掉三個羥基獲得。
It is to reduce Eu3+ into Eu2+ with electrolyzation method.
采用電解的方法將三價銪還原成二價。
a bivalent and trivalent metallic element of the rare earth group.
稀土屬二價和三價金屬元素。
The Study of Mongolian Three Valents V.+V. Compound Verb;
蒙古語V+V三價復合動詞配價研究
Evaluation on positive results in the determination of hexavalent chromium in trivalent chromium passivation coatings
三價鉻鈍化件六價鉻檢出陽性問題及其評價
costing 3 cents (US) or 2 pence (Britain).
價值三美分或兩便士。
Our offer remains open for 3 days.
我們的報價三天內(nèi)有效
and three months at four hundred and thirty-eight point five.
三個月遠期價為438.5便士。
Milk costs 30p a litre.
牛奶每升價格三十便士。
This assessment of 30 per cent for mistakes and 70 per cent for achievements is just about right.
三七開的評價比較合適。
Our offers are good for 3 days.
我方報價三天有效。
A one-way trip costs 3 yuan.
地鐵票價單程為三元，