Core Principle and Technical Analysis of Heat-Expanded Seamless Steel Pipe Process Core Principle and Technical Analysis of Medium and High Frequency Heat-Expanded Seamless Steel Pipe Process As an undergraduate majoring in Pipeline Industry, mastering the core principle and technical points of the Guanzhong medium and high frequency heat-expanded seamless steel pipe process is the foundation … Continue reading Tubo de aço sem costura expandido termicamente – Princípio Básico do Processo e Análise Técnica