Furfurylidene acetone obtained from acetone and furfuratdehyde by condensationwas used as a brightener in an acid-sodium chloride type Zn electroplating bath.

由丙酮和呋喃甲醛經(jīng)縮合反應(yīng)所制得的呋喃叉丙酮，用作酸性氯化鈉型鍍鋅的光亮劑。

Methods: Transfer the sample about 1ml, equvalent to about 2mg of Monoammonium Glycyrrhizinate, add 1 ml of 20% trichloroacetic acid using ethanol as the solvent, evaporate on a water bath to nearly dry, the residue appeares purple.

取本品1ml（約相當(dāng)于甘草酸單銨2mg），加入20%三氯乙酸乙醇溶液1ml，置水浴蒸至近干色无码免费视频一区二区，殘留物顯紅紫色。

In the study, nanocomposite Co/Al2O3 layers were fabricated by composite electrodeposition. Plating bath composition include cobalt sulfamate (CoSO4), cobalt chloride(CoCl2), boric acid(H3BO3), sodium chloride and nanosized Al2O3 powder with different volume concentration. Co ions and Al2O3 can codeposition of Cu substratum by DC current.

本研究以復(fù)合電鍍方式制備Co/Al2O3復(fù)合鍍層91cm182在线播放，所使用的電鍍液內(nèi)的成分有硫酸鈷日韩激情福利小说视频在线观看免费、氯化亞鈷、氯化鈉欧美视频网在线免费观看、硼酸国产亚洲日本在线观看，其中加入不同體積濃度的奈米級Al2O3粉末，使得Co離子和Al2O3粉末共沈積在Cu基材上而形成復(fù)合鍍膜国产一级无码中文字幕。

Digestion conditions, working conditions of atomic fluorescence spectrometer and conditions of hydride generation reaction were studied. Methods for the reduction from Se to Se by using boiling water bath and UV were compared. The amount of sulfamic acid for the elimination of the interference of nitrogen oxides was also investigated.

探討了消解條件哪里可以看免费的黄色网站、原子熒光光度計工作條件及氫化物發(fā)生反應(yīng)條件，對比沸水浴加熱和紫外光加熱2種將Se還原為Se的方法美女黄应用，研究氨基磺酸消除氮氧化物干擾的最佳條件H纯肉无遮挡3d动漫在线。

The aluminum for light-grid material in lead-acid batteries was electroplated with Pb-Sn alloy from sulphamate bath,and the opitimum technology condition and electrolyte composition were determined.

利用氨基磺酸鹽鍍液在鋁合金基體上電鍍鉛-錫合金作為鉛酸蓄電池的輕型板柵材料，確定了最佳電鍍工藝條件和鍍液配方99久久精神视频。

Methane sulphonic acid has the right combination of properties for electroplating bath s containing lead, tin, copper, nickel and some precious metals.

在含有鉛国产91精品熟女自拍、錫、銅公婬荡乱婬视频、鎳和一些貴金屬的電鍍池中免费xxxx视频，甲磺酸是一種很好的電解質(zhì)。

A process for chemical polishing of red copper in a weakly acid FeCl3-HCl bath was studied.

研究了紫銅在FeCl3–HCl微酸性體系中化學(xué)拋光的工藝中文字幕人成乱码熟女免费。

Viscose is then extruded through special orifices into an acid spinning bath to form cellulose fibers.

通過特制的孔將粘膠液擠出來欧美欲望视频，進(jìn)入酸性紡絲浴中后便形成纖維素纖維。

Viscose is then extruded through special orifices into an acid spinning bath to form cellulose fibers.

通過特制的孔將粘膠液擠壓出來国产一区精品福利，進(jìn)入酸性紡絲浴中后便形成纖維素纖維。

The result showed that the curcumin was unstable in sun light and alkali liquid, but it is stable in heating water bath and acid liquid.

研究結(jié)果表明偷窥盗摄国产在线视频，姜黃素對酸穩(wěn)定国产黄色对白视频，而對光、堿不穩(wěn)定。