The technology of weld's leakage-proof of large water-cooled radiator has been improved, and it has proved feasible.

解决了类似大型水冷散热器在防渗漏焊接技术方面的难题，并进行了可行性验证。

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By analyzing weld technology of the purple copper water-cooled radiator used in high-power chopper, we have found a newly direct and current anti-weld method.

本文通过对大功率斩波器紫铜水冷散热器的焊接工艺、技术进行分析研究，得出了一种新型实用的直流反接焊接技术。

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An induction motor, by contrast, can be cooled passively-and thereby dispense with the hefty radiator, cooling fan, water pump and associated plumbing.

相反地，诱导式发动机可以自冷却，这样就省去了笨重的散热片、冷却风扇、水泵和与此相关的铅用品制造。

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To meet a target price of 1, 000 marks, approved by the new German chancellor, Adolf Hitler, Porsche devised a rear-mounted, lightweight and air-cooled engine that avoided the need for a heavy radiator.

ECONOMIST: The VW Beetle