这段很难翻啊,希望高人指点!? the sheets shall be formed and the longitudinal and circumferential joints shall be swaged ( crimped ). the longitudinal joints may also be canted ( turned on edges ). the front faces shall be performed with standing joints or double lock joints (upright joints; single or twice folded). the use of pre-shaped or moulded parts is permitted. 有些词太专业了,高人指点下啊,多谢! 查看更多