| 摘要 |
<p>A new and improved brush assembly for cleaning a cylindrical surface, the improvement being in the planetary system which includes in combination a chain and a large stationary sprocket mechanism attached to the body of the cleaning machine, the said chain extending over the large sprocket and a second smaller sprocket, the second sprocket in the planetary system being the power transmitting means to a system of cleaning brushes for cleaning cylindrical surfaces.</p> |
