供应进口含银韧铜 C11300 C11400 C11500代理美国进口含银韧铜C11600银铜机械性
美国铜合***号：C11700C12000C12100C12200C12300脱氧铜C12500C12700C14200C14500C14700C14510C14710C14720纯铜C17510铍镍铜C18700含铅铜C19200含铁铜合金C19400C19600铜铁合金C21000C22000C23000C24000C26000C26800C27000C27200C27400C28000C31400C31600C32000C33000C33200C33500C34000C34200C34500C35000C35300C35600C36000C36500C36600C36700C36800C37000C37700黄铜C38000C38500铅黄铜***0500***0800***1100***1300***1500***2200***2250***3000***3400锡黄铜)