| 摘要 |
The invention relates to a support frame positioning a laser beam level and comprises: a first support module 1 inclusive a reference element 10 that can be positioned against a planar surface and enganging elements 11 located in a longitudinal direction A 1 to cooperate with a second support module 2 displaceable relative to the first support module 1 , bracing means 22 on the second support module 2 to support a laser beam type level 3 and a motor 25 to power a drive shaft in either of two directions of rotation of at least one element translatable along the first support module 1 , and a remote control for said motor 25. The support frame may be positioned in height on walss and allows automatically positioning the laser beam in the continuous and progressive manner FIG. 1.
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