大中直径HFW焊管机组高频接触焊与高频感应焊的讨论
대중직경HFW한관궤조고빈접촉한여고빈감응한적토론
Discussion on High Frequency Contact Welding and High Frequency Induction Welding in Large & Medium Diameter HFW Pipe Unit
저자의 최근 논문