... broken and easy to maintained etc2,Mould and concrete pipe Inner diameter:300-3000mmLength:1000-5000mmWall thickness:5mmSealing:Socket ... Plant4,Our project5,International cooperationIf you need our concrete pipe making machine,please tell me the following informations,thanks ... for your cooperation:...1,the pipe length2,the pipe inner diameter3,the pipe joint,flat,socket or rabbet?as ...