What do you think of the cross section?

According to article 7. 1.2.2 of GBT5000 1-20 10-20/kloc-0, "the side where the number is located is the cross-sectional direction of the section". In addition, cross-sectional views are directional, and arrows indicate which direction to look at after cutting from one surface.

Directionality:

1, front view, that is, front view;

2. Side view and side view;

3. Top view, looking down vertically from above;

4, cross section, cross section looks like, for example, an apple cut from the middle, cross section looks like.

The difference between sectional view and sectional view lies in:

1. The sectional view only shows the projection of the section after the shape is cut, while the sectional view shows the projection of the whole remaining part after the shape is cut.

2. The sectional view is the projection of the sectional shape, which is the projection of the body, while the sectional view is only the projection of a section, which is the projection of a curved surface. The shape of the section must have a section, so the section must include a section. Although the section is a part of the section, it is usually drawn separately.

3. The marks of cutting symbols are different. The cutting symbol of the profile only draws the cutting position line, not the projection direction line, and only uses the numbered note position to indicate the projection direction. Numbers are written on the lower side of the cutting position line, indicating downward projection. Notes are written on the left, indicating left projection.

4. You can rotate the section plane in the section view, but you cannot rotate the section plane in the section view.