BC: Covered by a light beam.

CLC: Buried in a column.

We: Buried in the wall.

We: laying along the wall in the open air.

FC: embedded in the ground.

BE: Laying along or across the roof truss.

CLE: placed along or across a column.

We: Lying along the wall.

CE: laying along the ceiling surface or ceiling surface.

ACE: It is laid on the ceiling where people can enter.

BC: Covered by a light beam.

Extended data:

Skills of reading cad drawings-

1, overview of the overall situation. When you get a painting, first look at the name of the painting and see if you have seen what the painting represents in your life. Secondly, look at the main structure and know what its general shape is.

2. Detailed list. There is no doubt that the most important thing in a drawing is the detail column, because the detail column represents the quantity, size and weight of all parts in the drawing. When you look at the picture together with the detailed list, you will greatly increase your understanding of the drawing.

3. Split the chart. In fact, a CAD drawing is a part, a board, welded or assembled. After reading the main structure, look at the exploded view and cross-sectional view of the parts, and you will know the internal structure of the parts in detail. So you can understand.

4. Side view and top view. A complete part needs at least three views to fully express the part. Therefore, when we look at drawings, we must look at multiple views together, so as to fully understand the structure of drawings. There is no blind spot or carelessness.