| 摘要 |
827,856. Smoothing concrete. SOMMER, A. March 6, 1956 [March 9, 1955], No. 7065/56. Class 107 A plastic concrete smoothing machine comprises three discs rotating in a common plane and arranged at the apices of an equilateral triangle. Discs 4 are arranged for rotation on a frame and are driven by the motor 2 The machine is guided by a handle 6. Wheels 11, arranged to pivot into and from an operative position, facilitate moving the apparatus when not in use. |
