GS-9A 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. 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.