... stability, convenient operation, high yield. 4000mm length concrete pipe for irrigation operation instruction 1, Assembling mouldsBrush the inner wall of ... .1, the pipe length2, the pipe inner diameter3, the pipe joint, flat, socket or rabbet? 4,If your pipe need to add ... other requests?Sincerely waiting for your information~~~~ 4000mm flat/socket/rabbet joint concrete pipe production line to Africa