Pennies in particular are rarely pure copper.
一般来说，硬币很少使用纯铜制造的。
Until fairly recently, the only way to extract pure copper from ore was by using a process that requires large amounts of electric energy, especially if the proportion of copper in the ore is low.
直到最近，从矿石中提取纯铜的最佳方法是使用一项需要消耗大量电能的工艺，尤其是当矿石中铜含量低的时候。
As the electroplating pure copper layer on copper alloy exceeds a critical thickness, the surface electroplating treatment can improve the copper alloy's resistance against oxidation failure greatly.
当铜合金表面的电镀纯铜层厚度超过一个临界值，表面电镀纯铜处理可以明显改善材料的耐氧化剥离性。
The insulating layer is pure natural rubber, copper wire for copper, so, in order to ensure the safety of wire and cable of good conductivity.
绝缘层一般为纯天然橡胶，铜丝为无氧铜，这样，才能保证线芯的良好导电性及电缆的安全性。
Material: Using pure copper can get rid of forming incrustation which is caused by long-term immersion.
材料：是否使用纯铜镀铬。摆脱传统水龙头因长期浸水而产生水锈的缺点。
Pure copper base ensures excellent heat dissipation, and anodized aluminum top prevents corrosion.
纯铜基底保证良好的散热效果，阳极电镀铝质上部防止锈蚀。
The mechanical properties of pure copper and brass to be much higher, but also widely used in machinery manufacturing industry in manufacturing various parts.
而且黄铜的力学性能相对于纯铜要高很多，而且还被广泛应用于机械制造行业中制造各种结构的零件。
Atmospheric corrosion of pure copper under sheltered and unsheltered exposure conditions during 1 year period in Shenyang atmosphere is studied.
通过1年的遮雨和未遮雨大气暴露实验，研究了在沈阳大气环境下纯铜的初期腐蚀行为。
Trace lithium can improve recrystallization temperature of pure copper.
在工业纯铜中加入微量锂能提高其再结晶温度。
The effects of surface electroplate pure copper on oxidation failure of lead frame copper alloys for IC package were investigated.
研究了在铜合金表面电镀纯铜层保护膜对铜合金引线框架氧化失效的影响。
A designed organic compound of triazine thiols monosodium (TTN) was used for preparing polymeric film (PTT) on pure copper by polymer plating.
通过有机镀膜的方法，利用一种自设计合成的三嗪硫醇化合物(ttn)在铜表面制备有机薄膜。
In this paper, creep tests were carried out on annealed pure copper and normalized bronze containing Al under static and cyclic tension at room temperature.
以退火纯铜及正火铝青铜在轴向拉伸下进行室温静、动态蠕变试验。
The effects of cyclic strain amplitude history and mean strain on the cyclic deformation behavior of pure copper were investigated.
揭示了紫铜在应变循环下的循环应变幅值历史、平均应变对循环特性的影响；
It is simple and quick to determine trace Pb and Bi in pure copper using the graphite furnace atomic absorption spectrophotometry.
石墨炉原子吸收光谱法测定纯铜中痕量铅和铋，方法可靠，简单快速。
This grows face plate of lock of heaven and earth 64 centimeters, weigh 17 kilograms, forging by manual sculpture, pure copper completely and become, enchasing 1500 to break auger, bright is dazzling.
这把天地锁面板长64厘米，重17公斤，全由手工雕刻、纯铜锻造而成，并镶嵌着1500颗碎钻，璀璨夺目。
Steel grain-reinforced pure copper cast composite was gotten successfully by suspension casting process and controlling the cooling rate.
采用悬浮浇铸工艺并控制冷却速度成功地得到了钢颗粒增强纯铜基铸造复合材料。
Pure copper is a superior structural material for cryogenic purposes. But it has been found that in the case of special conditions, pure copper can also suffer stress corrosion cracking.
纯铜是一种深冷温度下应用的优异结构材料，但在特定条件下产生了应力腐蚀开裂。
A rapid analysis method for determining the content of Zn in pure copper is given in this paper.
本文提出测定纯铜中锌的快速分析方法。
This paper studied the effects of rare earth elements on the properties(such as hardness, electrical conductivity and resistance to corrosion)of pure copper used in touching wire of electric railway.
研究了稀土对电气铁路电车线用纯铜硬度、导电性、 耐磨性、耐蚀性的影响。结果表明，随稀土加入量的不同，上述性能都有一定程度的变化。
Laser ablation of pure copper was investigated using photoacoustic signals excited in surrounding air when a pulsed-laser beam impinges a metallic surface.
利用脉冲激光束轰击金属样品表面时在周围空气中激发的光声信号研究了纯铜的激光烧蚀。
The results show that, when the T2 pure copper is extruded in multipass by route BC, the grains can be refined.
结果表明，T2工业纯铜在BC路径下经历多次挤压后，晶粒得到细化。
It was compared with the pure copper specimens to investigate the wear mechanism.
并与纯铜进行比较，探讨颗粒增强物对材料磨损行为影响的机理。
The microhardness of the coatings is relatively uniformly distributed and it is higher than pure copper.
涂层的硬度分布较均匀，且高于纯铜的硬度。
Damping alloy was composed of smelting manganese and pure copper, some elements were added into the alloy in order to improve its property.
使用火法冶炼的金属锰与铜组成锰基减振合金系，并为改善性能而填加了其他元素。
Our company mainly produces high quality pure copper pneumatic connector, copper plastic fittings, no leakage fast connection and trachea.
案。我司主要生产高品质纯铜气动接头、铜塑接头、无泄漏快速接头及气管。
Atmospheric corrosion of pure copper under sheltered and unsheltered exposure condition during 1 year period in Shenyang atmosphere was studied.
通过一年的遮雨和未遮雨大气暴露试验，研究了纯铜在沈阳城市大气环境下的初期腐蚀行为。
The results show that the recrystallizing temperature of pure copper are raised to a higher temperature range, which improves the thermal stability and bearing resistance to high temperature.
结果表明：经电脉冲处理的纯铜再结晶过程向高温区推移，使纯铜的热稳定性、 耐热性能得到了改善。
At present, the domestic seven big copper smelting enterprises are close consultation, so that the 2012 pure copper smelting processing problems and international related ore enterprises negotiations.
目前，国内七大铜冶炼企业正在紧密磋商，以便就2012年精铜冶炼加工费问题与国际相关矿企展开谈判。
Adopt excellent quality aluminium alloy panel, pure copper nozzle, fashionable lifting portable shower, stainless steel waterfall style top gush.
采用优质铝合金面板，全铜喷嘴，流行的无级升降手提花洒，不锈钢瀑布顶喷。
Adopt excellent quality aluminium alloy panel, pure copper nozzle, fashionable lifting portable shower, stainless steel waterfall style top gush.
采用优质铝合金面板，全铜喷嘴，流行的无级升降手提花洒，不锈钢瀑布顶喷。
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