| 摘要 |
<p>A measuring tool which has a first arm and a second arm where at least one of the arms is able to pivot so that the arms can be set at a variety of angles with respect to one another. The tool also has an angle scale and a pointer. The angle scale runs along the first arm and the pointer is able to pivot so that it can point to a variety of positions along the angle scale to give the angle between the arms, the pointer being arranged such that it can be swung away from and clear of the angle scale.</p> |
