Standing at a desk piled high with test reports, Wang Jianjun opened a yellowed notebook, which contained the parameters of the first-generation high-frequency welded pipe machine that he had recorded twenty years ago. At that time, we couldn't even afford temperature sensors. We had to rely on the ......
Read MoreBundy tube is a small-diameter double-layer welded tube with a diameter of 3-12.7mm, generally made of low-carbon steel. It was invented by Bundy from Ford Motor Company in Detroit, the United States in the early 1930s, hence the name Bundy tube.
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