Double column It is another important machine that has been manufactured to support the needs of customers who have a variety of needs than the basic machine. With more features than a CNC machine that can do, Double Column will focus on large work from 1 meter up to 3 or 4 meters depending on usage of the customer and the company D-PATTANAMONGKON CO., LTD. has already imported the Double column to support the customers' needs.