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The elevation is different, and there are reflective light troughs around the perimeter.
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Maybe it's a strip light! Turn a straight line into a dashed line, in.
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Generally speaking, it is a light strip, but it is better to look at the following diagram to explain what it is, if you draw it, it is good to offset it and change the line shape.
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The dotted line represents an invisible edge that is blocked. After drawing with an offset, just change it to linearity.
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This is very simple, it should represent the built-in light strip!
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You see if it's a light strip or a lamp tube, and if you draw it, you can draw a dotted line.
Is it a ceiling drawing?
Okay, I'll send it to you now, you remember to check! >>>More
What do you do? Home improvement or sprinkling.
Don't set the area so accurately, choose a bookstore of 89 square meters and a bookstore of more than 300 square meters.
If you ask someone to draw it for you, you may have to pay for it, because this picture is not finished in three clicks or two clicks.
I just saw your question, I have done a lot of CAD construction drawings for complete home improvement. >>>More