The PIC tube is made of long, internally deburred electrical weld tube or seamless steel tube by means of induction heating, stretch reducing and hot coiling.
管采用长的去除内毛刺的电焊管或无缝管作为坯管，经感应加热后进行张力减径，然后热卷曲成卷。
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After cutting, some may need to be deburred, some need to be bent; while other flat parts are just sent directly to powder coating, assembly, or directly to packaging.