| 摘要 |
<p>A spirit level, comprising a frame (2) which in turn comprises a side for resting on the surface of the component whose arrangement is to be checked and a reading side provided with receptacles for accommodating two bulbs (9, 10), each of which contains a bubble, the bulbs being suitable to allow viewing of the bubbles from the same reading side of the frame, the bulbs being arranged at right angles to each other so that their respective bubbles can move along planes which are perpendicular to each other and to the resting side of the frame, so as to detect inclination along two degrees of freedom of the surface of the component with respect to the horizontal plane defined by the bubbles when they are in the centered position in the bulbs.</p> |
