| 摘要 |
<p>The device has a long and narrow sliding element (1) with a pointed tip (11) to be pushed into a corner of the room. A scale (17) is printed on the element (1) and a marker (12) can be slid along a slot in the center of the sliding element (1). The sliding element (1) itself can be moved along a guide (3) attached in a right angle to a reference unit (2) to be positioned along the edge of the floor element.</p> |
