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二次世界大战期间,高频电气技术仅限于广播和通讯,战争结束后才开始尝试用于焊接钢管。大约在1950年,出现了第一台10 kHz焊机,当时称之为高频焊机,随着技术的快速发展,很快就更准确地被叫做中频焊机。中频焊接技术取消了钢带酸洗工序,但尚不足以淘汰已经很成熟的低频焊接技术。实
During World War II, high-frequency electrical technology was limited to radio and communications and began to attempt to weld steel pipes after the war. About 1950, the first 10 kHz welder appeared, which was then called a high-frequency welder. With the rapid development of technology, it was soon more accurately called an IF welder. IF welding technology to eliminate the strip pickling process, but not enough to eliminate the already mature low-frequency welding technology. real