黄铜是铜锌合金。Brass is an alloy of copper and zinc.铜锌合金叫做替代式合金.Copper - zinc alloys are called substitutional alloys.材料: 采用高强度结构或锌合金压铸或不锈钢制成.Material: Strengthened structure or zinc alloy die - casting or stainless steel....
Both companies have chief executives following near - legendary predecessors - Jack Welch at GE and Sandy Weill at Citi.两家公司的前任CEO都 是近乎传奇的人物 —— 通用电气是杰克?韦尔奇(JackWelch),花旗集团是桑迪?威尔(SandyWeill).For years, he as consigliere t...