| 摘要 |
991,472. Tools for smoothing plaster &c. R. GRUEB. March 9, 1962 [March 14, 1961], No. 9273/62. Heading E1S. [Also in Division B2]. A blade 1 for smoothing plaster &c. is flexible and of oblique parallelogram shape. It is of steel or plastics and may have a felt pad on the working surface. Blades are fixed to a disc rotated by an electric motor and two coaxial rings 10, 11 of blades may be provided on the disc. Several blades may be superimposed. |
