an alloy of copper and zinc的中文是什么?

an alloy of copper and zinc的中文是什么? 英语翻译an alloy consists of nickel and copper in the ratio of 4:7.if the alloy weighs 3.14kg,how much of each metal was uesd? IRON COPPER ALLOY是什么材料 紧急!Titanium-Cu和COPPER ALLOY有什么区别 alloy copper Grade A copper alloy和磷青铜有什么区别?是否磷青铜为铜合金的一种呢? 英语翻译An alkalin solution of copper salt was subjected to hot reduction by direct titration of a protein-free solution,in the presence of methylene blue,without inversion.Total sugar was determined after inversion with concentrated hydrochloric copper creating thunder by pulling on one of the corners of a thin copper sheet 怎么翻译? Write a letter to Locksmith for establishing business relations,with an aim of selling steel and copper locks to it.The source of your informationYour intentionYour business scopeThe reference as to your firm’s financial standingYour expectation /r （英文版的物理）Water heater that make use of the Sun often have solar panels mounted on the roof.(a)Why are copper pipes being used?(b)Why are the copper pipes and the metal sheet black in colour?(c)Why is there an insulation sheet under the International Chamber of CommerceNon-Circumvention,Non-Disclosure and Working AgreementFor COPPER CATHODES GRADE A Transaction some such什么用法?有个句子是some such alloy may be used to replace copper. 这句话里 out of which 是什么意思啊?They had invented bronze,an alloy that could be cast in molds,out of which they made tools and weapons. The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes? 英语翻译1.ESM 3-Dallas—Shredded Copper/Precious MetalsShredded copper/precious metal bearing from an end of life electronic products (EOLEP) shredding operation,with the majority of iron and aluminum removed.Material may contain plastic.The siz 请问谁知道这段英文的意思：Note:Exempt under ROHS/WEEE Directive 2002/95/EC Annex6-Lead as an alloying element in steel containing up to 0.35% lead by weight,aluminium containing up to 0.4% lead by weight and copper alloy containing up to