A mechanism for mapping data between different hierarchies within an industrial automation system facilitates the user of the different hierarchies. Firstly, a deformation amount of a crucible for experiment upon melting a silicon raw material and a history of supply power to a heater for experiment are measured to calculate deformation tendency of a crucible for mass production. However, molybdenum disulfide is expensive, has limited availability, and may have adverse environmental effects. A suitable lock is provided for selectively locking the clam shell members to each other to prevent a separation of the clam shell members.