1. LESSON -4 INTRODUCTION TO INDUSTRIAL SEWING MACHINE
2 PARTS IS MAIN IN MACHINE.
1.TABLE.
2.TOP.
TABLE- A MACHINE IS FIX ON TABLE AND A TABLE IS FIX ON STAND.THERE IS AN ELECTRIC MOTOR UNDER THE TABLE.

2. TOP - TOP IS A MAIN MACHINE. THERE ARE DIFFERENT PARTS IN IT.
1 . FLY WHEEL
2 . SPUL STAND
3 . BOBBIN AND BOBBIN CASE
4. THREAD GUIDE & TENSION REGULATOR
5. TENSION DEVISE
6. THREAD TAKE UP LEVER
7. PRESSER FOOT
8. PRESSER FOOT LEEFTER
9. NEEDLE PLATE AND NEEDLE BAR
10.SIDE PLATE AND FEEDDOG
11.HUKE SALE. 12. OIL TANK