| 摘要 |
A laser survey instrument, comprising a laser projector for projecting a laser beam onto a plane by rotary irradiation, a tilting unit for tilting the laser projector in two directions running perpendicularly each other and a tilt setting unit for setting a desired tilt angle for the laser projector at least in one direction, wherein the tilt setting unit comprises a tilt sensor for detecting a horizontal position and an angle detector for detecting an angle between the tilt sensor and the laser projector.
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