对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。
It may also use signal process system to decrease noise efficiently for compound expanded pipes, due to austenite rough grain size.
机械扩径是制造管筒形零件的一种精密成形方法。
Mechanical Expanding is one of the finishing processes in cylindrical part forming.
热扩钢管采纳的二步促进式扩管机集锥模扩径技能，数目字中频感应加热技能，液压技能于一机。
Thermal expansion Pipe adopted by two-step pipe mill set for expansion cone-type mold Expanding skills numerals medium-frequency induction heating skills skills in a hydraulic machine.
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