The forming reason and solving method of stress - corrosion cracking for brazed joint of Band pipe is studied in this paper and compared with copper- copper pipe joint at the same conditions.

本文着重研究了邦迪管钎焊接头应力断裂的形成条件以及解决方法，并比较了铜管-铜管钎焊接头在相同条件下应力断裂情况。

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It is successful to re-melt deposit pure copper rotating band on D-30 shell body by using the process.

本研究探索了一种新的焊接工艺方法—熔敷扩散焊接方法，采用该方法在30口径弹体上焊接纯铜弹带取得成功。

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The sulfide type copper is usually in very fine grain, the oxide type copper is in band shape or shapeless.

硫化态铜以众多的微细铜锍颗粒为主，赤铜矿以带状或不定形存在于其他矿物中；

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For the last three years, copper has traded on commodity exchanges in a narrow band centering around 76 cents per pound.

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