| 摘要 |
A laser leveler comprises a multiplicity of laser generators. One of the laser levelers is disposed in a top section which is rotatable with respect to a base section. The laser generator within the top section is rotatable through an angle of 90° between the horizontal and the vertical. A second laser generator is disposed within a midsection, located between the base and the top section. The laser generator within the midsection is capable of generating a vertical laser beam.
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