Step one:
First draw a horizontal line, then draw a semicircle.
Step 2:
Then draw two vertical lines on both sides, pay attention to the gaps on one side, and then connect them with arcs.
Step 3:
At the gap, draw a small triangle.
Step 4:
Draw a right angle on the left, paying attention to the double lines.
Step 5:
Then draw a vertical line segment and an arc of oil.
Step Six:
Use arcs to create a little layering at the top and bottom.