Alphabet of Lines
1.
Phantom Line
2.
Section Line
3.
Cutting-plane Line
4.
Leader Line
5.
Hidden line (Thread Sym,)
6.
Hidden Line
7.
Center Line
8.
Exstention Line
9.
Break Line
10.
Visible Object Line
11.
Break line, (freehand)
12.
Dimension Line
1.
Short break
2.
Construction lines
4.
Center line
5.
Hidden line
6.
Object line
7.
Section line
8.
Long break
9.
Extension line
10.
Dimension line
11.
Leader lines