Which is better, Zhongshu Heavy Industry or Jack?

Jack is not in the same class as China National Heavy Industry Corporation. The jack is driven by cheap synchronous belt, and the medium heavy industry uses double screw rods. In terms of cost, it is much higher than Jack's. Sewing heavy industry is designed by our own company, with unique model and internal structure. Jack completely imitates other brands. It's just that Jack has done a good job in advertising in recent years.