短语词组短语cementation belt joint 胶接皮带接头glued belt joint 胶接皮带接头conveying belt joint 输送带接头cemented belt joint 皮带胶接glue belt joint 皮带胶接Qinzhou -Hangzhou joint belt 钦graded joint ply belt 阶梯式运输带joint of belt 皮带接头 返回 belt joint