... tough policy 强硬政策 ; 强硬的政策 ; 强硬政策 tough copper 韧铜 Tough Test 艰苦测试 ; 韧性试验 ...
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tough pitch copper 韧铜 ; 紫铜 ; 韧炼铜
electrolytic tough pitch copper 电解勒炼铜
tough h copper 韧铜
tough cathode copper 阴极韧铜
tough pitch copper mould 火精铜结晶器
tough pitch copper WESTBANK 韧炼铜
fire-refined tough-ptiched copper 火法精炼韧铜
rolled electrolytic tough pitch copper 模轧电解韧铜
·2,447,543篇论文数据，部分数据来源于NoteExpress
Copper and iron were most commonly used as both are tough and easily shaped.
铜和铁使用最为普遍，因其坚固且易于塑形。
youdao
While China remains the major player in copper, 2012 will be a tough year.
FORBES: Higher Copper Output Expected In 2012, Imports Will Slow -- Jones
We face a tough six to eight months, but towards the end of the year we should touch bottom on copper, aluminum and zinc.
CNN: Money & Investing
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