free from acid 中文意思是什麼
free from acid
解釋
無酸的-
This paper introduced the improves of roasting - sodium processing and such pollution - free processing as acid leaching - extration, roasting in air - acid leaching - extration, liming roasting - alkali leaching on extraction of v2o5 from stone coal, the total recovery rate obtains enhances, the industrial application prospect is good
摘要介紹了石煤提釩傳統工藝的改進以及酸法萃取、無鹽焙燒酸浸萃取、氧化焙燒堿浸等幾種從石煤無污染提取五氧化二釩的工藝流程，上述工藝不但生產過程無環境污染，釩的回收率還大有提高，是很有前途的清潔生產工藝。 -
The corrosion behavior of nanocrystalline ( nc ) copper bulks with various grain sizes prepared from igc ( inert gas condemsation ) and vacuum annealing in comparison with conventional microcrystalline ( mc ) copper ( as - rolled and electrolytic ) in acid copper sulphate solution and neutral solution containing chlorides under free corrosion conditions and anodic polarizations has been studied using potentiodynamic polarization, potentiometric analysis, cyclic voltammetry and electrochemical impedance spectroscopy. x - ray diffraction was used to estimate the grain size of the annealed nc copper. field emission gun scanning electron microscopy and x - ray energy - dispersive spectroscopy was used to characterize the surface morphology and analyze the surface composition after the polarization and potentiometric test of both nc and mc copper
本文研究了用igc （惰性氣體蒸發凝聚原位溫壓法）制備並真空退火到不同晶粒尺寸的納米晶銅和微米晶銅（冷軋紫銅、電解銅）在酸性硫酸銅溶液和中性含氯溶液中，在自腐蝕狀態和陽極極化狀態下的腐蝕性能。使用了動電勢極化、電位測定、循環伏安法（ cv ）和電化學阻抗譜（ eis ）等方法。 x -射線衍射（ xrd ）的方法用來估算納米晶銅晶粒尺寸。 -
The residue discharged during the operation process of the plant is pollution - free clean liquid, which has solved the difficult problem of waste acid and waste liquid generated from original purification equipments
裝置運行過程中排出的殘液為無污染的潔凈液體，解決了困擾原凈化裝置的廢液廢酸的處理難題。 -
Abstract : the iodine is extracted from fluorosilicic acid solution by carbon tetrachloride after the iodine ion is oxidized to the free iodine. the oxidant b is adopted through sifting oxidants
摘要對氟硅酸提碘過程的氧化劑進行選擇研究，結果表明，對碘回收率而言氧化劑b較好。 -
The surface must be tough, clean, dry and free from oil, grease, wax and other dirt. use sanblasting, whetting or acid - wash to remove the floating cement paste
底材必須堅固、清潔和乾燥，無油、脂、臘和其他污物。去除浮漿（可用噴砂、研磨、酸洗） -
In this study the definition is under the conditions of 55, ph4. 6, from 0. 1 % phytic acid sodium salt, release 1 nmol free phosphorus in one mintiue is one enzyme activity unit and the acetone method is the suitable measure way of the research was also decided
確定本實驗用的植酸酶酶活定義為： 55 ， ph4 . 6的條件下，每分鐘從0 . 1的植酸鈉溶液中釋放1nmol的無機磷為一個酶活單位（ u ） 。
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