| 摘要 |
<p>The screwdriver (1) is assembled of a cylindrical handle and shaft protruding from its front with a suitable blade for the particular operation. A battery (2) is accommodated inside the handle connected to two small light bulbs (3) with shorts ducts (5). When a screw has to be tightened or loosened at night time in an area with no access to electric light a button (4) at the bottom of the handle is pressed activating the battery (2) and switching on the connected light bulbs (3).</p> |
