31.

How do I install the bobbin wound with thread? (For models equipped with a quick-set bobbin)

32.

Where do I put the oil in my machine?

33.

How do I draw up the lower thread by hand? (For models equipped with a quick-set bobbin.)

34.

Why does the needle keep breaking?

35.

How do I sew hook-and-loop fasteners(hook-and-loop tapes)?

36.

Why does the lower thread keep breaking?