the structure is made of a machine bed with a sliding carriage in its rear section. both are in electrowelded steel duly stabilized after each work phase to ensure that there is no interior tension they are sized to guar......the structure is made of a machine bed with a sliding carriage in its rear section. both are in electrowelded steel duly stabilized after each work phase to ensure that there is no interior tension they are sized to guarantee stability and precision during machining operations.