| 摘要 |
<p>1. A two-part spectacles side-piece of continuously adjustable length, in which a first part (1) of the side-piece is of hollow construction in the form of a sleeve and telescopically accommodates a second part (2), characterised in that the wall of the sleeve of the first part (1) of the side-piece has recesses (8a, 8b) on opposite sides to receive an elongate nut (3), one end of a screwthreaded rod (4) being screwed into the nut, the other end of the rod being anchored firmly in the second part (2) of the side-piece.</p> |
