GS-9C is a vertical installation type sewing machine with a sealed built-in oil tank lubrication system. Dust-proof needle roller bearing means extending the life of moving parts, reducing maintenance costs and adapting to a variety working environment. You can adjust the sewing machine speed with adjust-able pulley, and it has an automatic thread cutting function with cylinder. Suit-able for food, chemical industry, ports and many other industries. It is used to seal various packaging bags such as flour bags, plastic woven bags, and sack bags, etc. It is the best product for high-speed bag production line with the characteristics of high sewing speed, low noise and long service life.