| 摘要 |
<p>PURPOSE:To reduce stains on the bottom of a base so as not to detract from the commercial value by providing small projections on the bottom of the base. CONSTITUTION:A base is so formed that pins 2 are embedded in a body structure 1 made of resin. Column projections 4a are arranged at equal positions on a bottom 3. The projections 4a are made of resin in unity with the body structure 1. It is effective the projection has 0.1mm or more in height because stains are not stuck onto the bottom. Therefore, the stains can be almost eliminated on the bottom of the base without any detraction from the commercial value.</p> |
