焊管方型化的连续成型工艺开发研制
程志彦, 张慧云, 吕坚
Development of continuous forming process of squared welded pipe
CHENG Zhi-yan, ZHANG Hui-yun, LÜ Jian
中国冶金 . 2021, (8): 83 -91 .  DOI: 10.13228/j.boyuan.issn1006-9356.20210189