Step #1
Start the tutorial by making a rectangle & two lines as shown.
Step #2
Draw four lines as shown.
Step #3
Make three candle like shapes as shown.
Step #4
Draw shape as shown.
Step #5
Make mouth piece and tuning side shape as shown.
Step #6
Make water key shape as shown.
Step #7
Make lead pipe shape as shown.
Step #8
Draw 1st, 2nd and 3rd valve as shown.
Step #9
Make 1st valve side shape as shown.
Step #10
Draw 3rd valve side shape as shown.
Step #11
Finally, make necessary improvements to finish.