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APA Citation
Lei, S., Hao, L., Wenzhong, J., Zhiyu, M., Guihua, L., & Xiaofeng, W. (2016). portholes-equal channel angular pressing: novel technique for extrusion of 6061 aluminum alloy tube by subsize billet. International journal of advanced manufacturing technology, 85(1), 355–363. http://access.bl.uk/ark:/81055/vdc_100080468075.0x000147