| 摘要 |
A light leveling device includes a housing having a chamber to rotatably receive a light instrument which may generate a light beam or a reference line out through the housing. One or more batteries may be used to energize the light instrument. The light instrument may be rotated relative to the housing, for allowing the light beam or the reference line to be rotated relative to the wall members. The light instrument includes a knurled surface to be rotated by users. The light instrument includes a projection slidably engaged in a curved passage of the housing, to limit the rotational movement of the light instrument relative to the housing.
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