铁道行业机车车辆用曲面卡套式管接头、锥面卡套式管接头标准介绍
철도행업궤차차량용곡면잡투식관접두、추면잡투식관접두표준개소
Description of standards-curved surface clamping and sleeving pipe connection and conical surface clamping and sleeving pipe connection for locomotive and rolling stock in railway industry
저자의 최근 논문