Mixture of concrete truck to transport from one place to another, and a concrete mixing drum

摘要

"Truck mixing concrete to transport from one place to another, and a concrete mixing drum.A mixing drum of concrete includes a wall which has a first section (41) and a second section (43).The first section (41) extends in a spiral along an axial centerline (31) of the drum.The second section (43) extends in a spiral along the central axial line of the drum (31) adjacent to the first section (41).