Step #1
Start the work by drawing an oval & a triangle like shape as shown.
Step #2
Draw cap like shape as shown.
Step #3
Make vertical lines falling downward as shown.
Step #4
Make tiny rounded shapes & two lines as shown.
Step #5
Draw several vertical and horizontal lines as shown.
Step #6
Make several vertical lines each connecting to a single horizontal line as shown.
Step #7
Finally, make necessary improvements to finish.