查询词典 lead-free

Compared with ferrous sulfate deoxidization method, lead chrome yellow production technology was fitter to the production requirements of enterprises. It not only treated the pollution of heavy metals, but also it reclaimed and utilized lead and chrome resources, and it reduced or avoided the secondary pollution, which could gain good economic benefit and social benefit.

铅铬黄生产工艺与硫酸亚铁还原法相比更适合企业的生产需要，不仅治理了重金属污染，同时回收到利用了铅、铬资源，减免了二次污染，取得了良好的经济效益和社会效益。

The assistant materials in lead chrome yellow production such as Al2 (SO4)3, nitric acid, caustic soda and lead nitrate solution were taken as medicaments to treat the wastewater from pigment production and the treatment effect was compared with that by ferrous sulfate method.

方法］用Al2(SO4)3、硝酸、烧碱和硝酸铅溶液等铅铬黄生产原辅材料作为药剂，治理颜料生产废水，并与硫酸亚铁还原法的治理效果进行比较。

When the sodium lauryl sulfate and p-octyl polyethylene glycol phenyl ether is used and its level in 3% and 6: 4 ratio, the polymerization process has the lowest coagulum and the highest monomer conversion. Higher reaction temperature and more level hydroxyl value lead to more coagulum, the latter also lead to larger particle size. The acid value has larger influence on viscosity and coagulum, there exist a best range. The emulsion particle size is larger for its hydrophilicity, most of its particles are connected together.

在含较高亲水单体的乳液聚合体系中，难以制得稳定的预乳化液，不能采用工业生产中常用的预乳化工艺，而只能采用混合单体直接滴加的方法；由于单体混合物的亲水亲油值较高，用阴离子型乳化剂十二烷基硫酸钠和非离子型乳化剂聚乙二醇辛基苯基醚混合，用量为单体总量的3％，且比例在6：4时，乳液聚合时具有最低的凝聚物含量和最高的单体转化率；乳液聚合反应温度升高，可以提高单体转化率，增加反应速度，但凝聚率相应提高；随着羟基单体含量的增加，聚合过程中凝聚率增加，聚合物乳胶粒平均直径增加；羧基单体有一个最佳的用量（2.6％），过高或过低凝聚率均提高；羧基含量对乳液的粘度有较大的影响，当羧基含量较低时，羧基含量增加，乳液粘度增加明显；含羟基乳液粒子由于含亲水基团较多，使得乳胶粒径增大，乳胶粒子大多数互相凝聚在一起，处于凝聚态。

Collarband, no occupiers whether round, square, acuminate or in ironing all keep it open deformation, had better be fixed shape and ironing, If there is a lead of iron wire, don't general plait, just after death, while it is still hot, with warm hands, gently press fold look like this will lead to live.

领口部位，无领者不论是圆形，尖形或方形，在整烫时都注意不要把它拉开变形，最好是固定形状再加以熨烫；如果是有领片的，不要将领褶线烫死，只要再烫以後，趁它还是温热的，用手翻折轻压，这样子领片看起来会比较活。

According to the direct ratio relationship in a certain range between the color degree of the organic solvent with Pb^2＋ and dithizone in the complex compound and the amount of the lead, the amount of the lead can be rapidly determined by way of the visual colorimetry.

再加入双硫腙的三氯甲烷溶液，根据Pb^2＋离子与双硫腙生成的配合物在有机溶剂中的颜色深浅与铅含量在一定范围内成正比的关系，用目视比色法即可快速判断出样品中的铅含量。

After the sample is dissolved and the disturbance eliminated, then dithizone and chloroform solution are added in the sample. According to the direct ratio relationship in a certain range between the color degree of the organic solvent with Pb2+ and dithizone in the complex compound and the amount of the lead, the amount of the lead can be rapidly determined by way of the visual colorimetric.

样品消解并消除干扰离子后，加入双硫腙的三氯甲烷溶液，根据铅与双硫腙生成的络合物在有机溶剂中的颜色深浅与铅含量在一定范围内成正比的关系，用目视比色法即可快速判断出样品中的铅含量。

It did not lead him to meditate upon his frailty as a creature of temperature, and upon man's frailty in general, able only to live within certain narrow limits of heat and cold; and from there on it did not lead him to the conjectural field of immortality and man's place in the universe.

这不会是他开始沉思自己作为一种有体温的生物的脆弱性，人类一般只能在一定冷热限度内生存的脆弱性；这也不会使他考虑关于不朽和人类在宇宙中的位置之类的问题。

Quality lead market.very drastic, our products alway keep ahead/lead in industry /craft brother.

缔造完美的品质一直是我们追求的目标，在市场激烈的竞争中，我们的产品一直遥遥领先在行业前列。

2 Move track ball to the opposite lead and cross hair aligns to same lead.

移动跟踪球到金手指对面和排列标线在相同的金手指上面，按" ENTER "确定

Crossruff:To trump (one's partner's lead or a lead from the dummy) in alternating plays.

进行交叉吃张：在交替打法中用王牌吃进。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。