| 摘要 |
<p>A clearer-board for beehives of the type which can also function as a queen excluder including at least two sheets (1, 2) each having a plurality of apertures (3) said sheets (1, 2) being in juxtaposition between two enclosures for bees, the sheets (1, 2) being adapted to be relatively and progressively moveable between two end or limiting operating positions, a first end position wherein said apertures on the sheets are in substantial alignment and a second end position wherein said apertures are out of alignment to allow control of the passage of bees between the two enclosures.</p> |
