| 摘要 |
<p>The device has a glass lens having diameter of 13.5 cm, where the glass lens is fixed on a handle made of bamboo. The handle acts as an attachment unit for the glass lens. The glass lens is retained at the handle using a sharp-edged thin strap made of bamboo. The thin strap is struck and introduced into the handle. The handle includes a set of strips allowed to cover the glass lens, where the set of strips has length of 3 cm to inhibit articulated movement.</p> |
