无铅的

2 The analysis step by 25.0mL sample lixivium, moved in the direction of arsenic in the bottle, plus 10 ml of hydrochloric acid and 10 ml of potassium iodide solution and 5 drop acid stannochlor solution, shake the place 10min, together with 2 g of arsenic-free zinc metal, immediately mounted a good lead acetate paper turns red cotton and mercury bromide from log that arsenic tube placed in the 25-38, f μh of the dark side, remove the test strip and standard mercury bromide a color not deeper than standard.

7.2 分析步骤取25.0mL样品浸泡液，移入测砷瓶中，加5mL盐酸、5mL碘化钾溶液及5滴酸性氯化亚锡溶液，摇匀后放置10min，加2g无砷金属锌，立即将已装好乙酸铅棉花及溴化汞试纸的测砷管装上，放置于25～30℃的暗处1h，取出溴化汞试纸和标准比较，其色斑不得深于标准。

They found that the degree of corrugation in the lead layer changes with temperature in precisely the way expected for an ideal system with no defects.

他们发现铅层的褶皱程度正如一个理想的无缺陷系统一样随着温度改变而精确的变化着。

When fishing a Zulu or Floating worm subsurface, but using a traditional "weightless" technique, you may want to: use a larger hook (Fig. 16), add some weight to your hook such as "Sticky Weight"(Fig. 17) or SuspenStrips, use a swivel and a short leader (Fig. 18) or other technique to cause the lure to sink to the desired depth or to suspend it.

当你想使用软饵 ZULU 或是漂浮型软虫，却需要采用无坠钓法在中层水域施钓，你可以采用大一些的软虫钩（图片16），在钩的中部添加一些重量，如粘铅，（图片17），或是使用八字环，接一小段前导线（图片18），利用可以有的办法，原则上掌握添加重量的比例，使其达到施钓水层或者驻留在某个高度。

First of all, this study will be multi-walled carbon nanotubes by chemical oxidation process purified so it can be modified to deal with than the purification of purity before the modified 5 wt%, more than 1.89 times the surface area to increase the surface potential decrease of about 10 ~ 20 mV and the surface functional base (-COOH and-OH) to increase 1.45 times, and then the control technology of electroless preparation parameters include: analysis of plating time, plating analysis of temperature, metal ions in solution than the (Fe2+/ Ni2+), bath pH and the added value of dispersion Agent and other research towards Fe-Ni particles to increase the iron content and Fe-Ni particles spread in the MWCNT upper fixed targets,the results found that when the parameters for the preparation of 50 ℃, pH10, do not add dispersant, metal ions than the solution (Fe2 +/ Ni2 +) 7, the highest iron content can be Fe = 40.55 at%(flat iron content 111.17 mg / g) of nanocomposites Fe-Ni/CNT, then for a series of the nature of its analysis, the final evaluation Fe-Ni/CNT nanocomposites were processed on the effectiveness of the application of mixed pollutants, the results showed that in 120 minutes at the same time when Adsorption of heavy metal ions lead nitrate 10 ppm, selenium heavy metal ion degradation of 1 ppm and orange azo dye AO7 50 ppm standard of effluents, and after a total Fe-Ni nano-particles to SEM / EDS analysis of more than 50% still remaining.

本研究首先将多壁奈米碳管以化学氧化法做纯化改质处理能使其纯度较纯化改质前提高5 wt％、比表面积提高1.89倍、表面电位下降约10~20 mV以及表面官能基提高1.45倍，再控制无电镀技术之制备参数包括：析镀时间、析镀温度，镀液中金属离子比(Fe2+/Ni2+)、镀液pH值及是否添加分散剂等，研究朝提高Fe-Ni粒子的含铁量与Fe-Ni粒子散布固定在MWCNT上等目标进行，研究结果发现当制备参数为50 ℃、pH10、不添加分散剂、镀液金属离子比(Fe2+/Ni2+)7时，可得到最高铁含量Fe = 40.55 at％(单位铁含量111.17 mg/g)之奈米复合材料Fe-Ni/CNT，接著对其作一系列性质分析，最后评估奈米复合材料Fe-Ni/CNT对共处理混合污染物之应用效益，结果显示其在120分钟时能够同时吸附重金属硝酸铅离子10 ppm、重金属硒酸根离子1 ppm及降解偶氮橘色染料AO7 50 ppm达放流水标准，且共处理后奈米Fe-Ni粒子以SEM/EDS分析仍剩余50 %以上。

Parallel to the nomographic method, the numeri- cal calculating method is also put forward here. As an example, the lead and aluminium rings are pressed with oil lubrication or with- out. The results of data processing by nomogram and the numerical calculating are compared.

在线图法处理实验数据的基础上，提出了理论计算法，并对铅、铝两种材料在有无润滑剂条件下进行了圆环压缩试验，比较了用线图法和理论计算法对实验数据的处理结果，指出了各种方法的优缺点。

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A varnish used for coverlay was prepared with special epoxy resin, carboxyl-terminated acrlonitrilebutadiene rubber and phosphorated flame retardant. To conform to the requirements of RoHS, the halogen-free flame-retarded coverlay does not contain Stibium, lead, mercury, cadmium and chromium Ⅵ.

摘 要：采用端羧基丁腈橡胶增韧改性特种环氧树脂体系，配合使用添加型磷系阻燃剂得到覆盖膜用胶液，以此制备的SF305C无卤阻燃型覆盖膜不含锑和铅、汞、镉、六价铬等有害重金属，满足欧盟RoHS指令要求。

In chapter five, the heterocyclic compounds modified electrode for detection of lead has been discussed.

该修饰电极为创造高灵敏度高选择性的无汞测铅传感器提出了一个新的途径。

SF-1 is a kind of oilless slide Bushing made of the PTFE composite material,Which is a copper-plateed steel plate on to which a

SF-1是由PTFE复合材料制成的无油润滑轴承，是将锡青铜球粉烧结到镀铜板上形成多孔屑，然后将PTFE和铅

And LED is free of infrared ray and ultraviolet radiation pollution.

LED采用的发光材料氮化镓本身不含汞、铅等有害物质，无红外线和紫外线污染

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。