| 摘要 |
<p>SPRAYING APPARATUS A spraying apparatus is provided with a pair of discs for masking the material which is sprayed. The discs are mounted on an axle which is free to move up and down within the spraying apparatus as the spraying apparatus moves over the surface which is being sprayed. Each of the discs includes an axially extending flange which provides a well for retaining material which is sprayed onto the disc.</p> |
