Marker symbol description

This demo is to make a marker symbol shown in the following figure. The following figure labels the size of the marker symbol. This marker symbol consists of lines and circle strokes.

The marker symbol design

How to make it?

Based on the above marker symbol design, the steps for making the marker symbol is as follows.

1. Draw a closed half arc, including a half arc and its diameter;
2. Draw a circle at the middle point of the diameter of the half arc;
3. Draw other line strokes.