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1·Currently, the exothermic welding has been widely treated as substitute to replace the mechanical connection between metals.

当前，放热焊接已经普遍取代了以往金属之间的机械连接方法。

2·Principle of exothermic welding technique, properties of welding joint of cathodic protection cable and cost economization of the process are discussed, too.

介绍了铝热焊接技术的原理、阴极保护电缆焊接接头的性能及经济效果。