Light steel keel ceiling screw must be installed vertically? There are pictures.
The other oblique some is irrelevant, can be adjusted on the screw
Oblique also does not matter, mainly in order to leveling, steel keel flat can, because there is no much weight, the most important is the lamp, there is no jin, so how we installed no problem
So that the vertical is the most easy to pull out, you pull things are subconsciously vertical pull, the most effort. So oblique, pull even more ~
As far as possible vertical, but in the adjustment process, there are still some skewed points.
Seemingly now are light steel keel. Wood keel trouble Now the ceiling is basically met
