查询词典 copper coin

Since the enhanced contraceptive action of copper-bearing intrauterine device is commonly attributed to copper ions released as a result of copper corrosion, this thesis focused on the investigation of various factors probably affecting the corrosion behavior of copper in the case by in vitro measurements.

为配合各种新型含铜宫内节育器[如含消炎痛VCu IUD、Tcu IUD、γ型IUD及含左旋18-甲基炔诺酮的Cu IUD]的研制与临床应用，探索对避孕起关键作用的铜在各种情况下的腐蚀行为及影响因素，本文对几种新型Cu IUD在宫腔内可能涉及的腐蚀类型及影响因素进行了研究。

The results show that in Cu/Copper-coated graphite composite,the volume density and the electrical conductivity decreased with the increasing of copper-copper-coated graphite,while the graphite in it is fairly well-distributed and the copper helps to form the three dimensional net-shape,thus making the composite have better electrical conductivity than the c...

结果表明，随镀铜石墨含量的增加，铜-镀铜石墨复合材料的密度和导电性降低，但其组织中石墨分布更均匀，并且铜有利于构成三维网状，使该复合材料具有更好的导电性。

The oxide bound iron, copper to available iron, copper and carbonate bound manganese, zinc to available manganese, zinc has positive effect, but residual iron, copper to available iron, copper and oxide bound manganese to available manganese have negative effect.

铁锰氧化物结合态铁、铜对有效态铁、铜及碳酸盐结合态锰、锌对有效锰、锌具有一定正效应。

Showed that the core business of the western mining for lead, zinc, copper mining and lead, zinc, aluminum smelter, the company is now mainly owned and controlled Xitieshan Lead-Zinc Mine have been the Ada copper polymetallic ore, copper tournament even Tong, Gacun silver polymetallic ore and Yulong Copper Mine.

表明，在西部矿业铅的核心业务，锌，铜开采和铅，锌，铝冶炼厂，该公司目前主要拥有和锡铁山铅锌矿控制一直是阿达铜多金属矿，铜比赛甚至塘，呷村银多金属矿和玉龙铜矿。

The mainly conclusions in our research are as flowing: tungsten trioxide powders with 100 nm primary particle are obtained by spray drying,calcination and wet milling process, and an average size of quadric particle composed of agglomerated particles is 0.64 μm; tungtsen powders with 39 nm grain size and 60 -100 nm primary particle are produced directly from previous tungsten trioxide using one step reduction in hydrogen at 700℃, and an average size of quadric particle of tungsten powder is 2.91 μm; tungsten trioxide and copper tungstate compound powders with 100 nm - 200 nm primary particle are produced using ammonia metatungsten and copper nitrate as raw materials by spray drying,calcination and wet milling process;the compound powders are transformed completely into tungsten and copper compound powders by reduction in hydrogen at 700℃,in which tungsten grain size is 59 nm and copper grain size is 51 nm; primary particle size of compound powders is 80 - 120 nm,and an average size of agglomerated quadric particle is 1.86 μm; tungsten nitride powders with 35 nm grain size are prepared from tungsten trioxide powders by nitrogen treatment thoroughly in pure ammonia at 650℃, and an average size of agglomerated quadric particle is 0.64 μm in normal temperature.

研究结果表明：采用喷雾干燥—焙烧—球磨工艺可以制备出粒度约为100nm的WO_3粉体，它们在团聚后形成的二次颗粒平均粒度为0.64μm；采用一步直接氢还原方法可在700℃下从上述WO_3粉体制备出晶粒尺寸为39nm的、一次颗粒粒度为60-100nm的W粉体，其二次颗粒的平均粒度为2.91μm；以偏钨酸铵、硝酸铜为原料，采用喷雾干燥—焙烧—球磨工艺可制备出一次粒度为100-200nm的WO_3和CuWO_4混合粉体；采用氢还原工艺可在700℃下将这种粉体完全转变为W、Cu复合粉体，其中W的平均晶粒粒尺寸为59nm，Cu的平均晶粒尺寸为51nm；复合粉体的一次颗粒尺寸为80-120nm，在常温下团聚后形成的二次平均粒度为1.86μm；采用纯氨氮化工艺可以在650℃下由WO_3粉体制得WN，其晶粒尺度为35nm，在常温下团聚后的二次平均粒度为6.4μm。

Tianjin, Zhi-xiang Precision Electronics Co., Ltd. is a Taiwanese joint venture. In January 1998 in the mainland to set up Johnson hardware factory in Dongguan, in July 2001 in Kunshan, Jiangsu to establish Ho Li Precision Electronics Ltd., with the market development and customer demand and in December 2006 the establishment of Jinnan District in Tianjin, Zhi-xiang precision Electronics Co., Ltd., mainly engaged in import of beryllium copper, phosphor bronze plate, yellow copper, S301, S304 stainless steel plate, aluminum material, SK5, SK7 high-carbon steel and high-conductivity copper a variety of different materials such as copper metal materials, meanwhile, should customers request a variety of sizes of sub-section, shear processing.

天津志翔精密电子有限公司是一家台商合资企业。1998年1月在大陆东莞设立德昌五金厂，2001年7月在江苏昆山设立合利精密电子有限公司，随着市场的发展与客户的需求与2006年12月在天津津南区设立志翔精密电子有限公司，主要经营进口铍铜、磷青铜板、黄铜板、S301、S304不锈钢板、铝材、SK5、SK7高碳钢及高导电红铜铜等多种不同材质的金属材料，同时，应客户要求可进行各种尺寸的分条、剪切加工。

Sichuan Nico State-run New Materials Co., Ltd.- to lithium, cobalt, copper, nickel, lead, zinc, molybdenum, silver mining, elections, Metallurgical, chemical-based industry. In Sichuan, Jiangxi, Tibet, Qinghai and other places have a more than mine and smelting plant, is an important lithium, cobalt, copper, nickel integrated production base. The corporation has an annual production capacity of 3,000 tons of lithium hydroxide, lithium carbonate 2000 tons, 1,500 tons of electrolytic nickel, copper and electrical copper 5000 tons, 500 tons of lithium cobalt oxide, cobalt and cobalt board 500 tons of salt, lead and zinc concentrate, 20,000 tons, MOLYBDENUM 1200 tons, 26 tons of silver production scale, product widely used in petrochemical, aerospace, automotive industry, high-energy batteries, pharmaceuticals, ceramics, aluminum and other industries areas, in national economic development plays an important role in promoting.

公司业已形成年产氢氧化锂3000吨、碳酸锂2000吨、电解镍1500吨、铜粉及电铜5000吨、钴酸锂500吨、钴板及钴盐500吨、铅锌精矿20000吨、钼精矿1200吨、白银26吨的生产规模，产品广泛应用于石油化工、航空航天、汽车工业、高能电池、医药、陶瓷、炼铝等行业领域，在国民经济发展中起着重要推动作用。

The main production of copper alloy tubes, copper water pipe insulation compound, copper trachea and connecting pieces, purple yellow brass, refrigeration accessories and all kinds of copper fittings and so on.

主要生产各种铜合金管材，复合保温铜水管、铜气管及连接件、紫黄铜管、制冷配件及各类铜配件等。

Meanwhile, the company is the sales agent of China Aluminium (Shanghai、Luoyang) Copper Co.,Ltd mainly sells various kinds of red copper, brass, tin bronze, oxygen-free copper, zinc copper-nickel alloy and its strip, board, stick materials.

公司同时又是中铝铜业有限公司的销售代理商，主要经销各种规格的紫铜、黄铜、锡青铜、无氧铜、锌白铜及其带、板、棒材。

Li Rui Linyi Co., Ltd, located in Linyi City, Shandong Province, is an experienced professional lock-making enterprise, has a mature system of locks that the professional teams, 10 senior technical engineers, employees and more than 100 people, all kinds of machine tools more than 80 Taiwan , The annual output 300,000, we produced the "double-Hill" brand,"Switzerland of the" brand series of locks in the Chinese copper industry reputation lock, a total of eight series of products, more than 40 species of flower color models, including high-grade copper Forging big American luxury handle lock, American copper forging ball lock, Continental Copper forging bailiffs hand locks, door locks, and so smart, Mortise lock gall U.S. UL certification.

临沂瑞力五金有限公司，位于山东省临沂市，是一家资深的专业制锁企业，拥有一支成熟的专业制锁技术队伍，高级技术工程师10 人，员工100多人，各种机床80余台，年产量30万把，我们生产的&双山&牌、&瑞力&牌铜质系列门锁在中国锁业享有盛誉，产品共有8个系列，40余种款式花色，主要包括高档纯铜锻造美式豪华大把手锁，美式纯铜锻造球型锁，欧式纯铜锻造执手锁，智能门锁等，Mortise 锁胆获得美国UL认证。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？