| 摘要 |
An apparatus for laying out a building foundation is provided. The apparatus according to the present invention includes a first member for engaging a wire and a second member mounted to the first member and movable between a range of positions. The second member further includes a laser. A protractor is disposed between the first and second members for measuring the position of the second member in relation to the first member. The apparatus further includes a measuring device that is disposed adjacent to the first member for measuring a distance the apparatus travels along the wire.
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