Disclosed is a molten metal producing device capable of effectively preventing a hanging of a metal agglomerate raw material layer and capable of reliably removing hanging even if the hanging occurs. In particular, the method and apparatus may be applied to the analysis of an injection molding process for producing a molded polymer component from a thermoplastic or a thermosetting polymer. The invention further provides a method of chemically-mechanically polishing a substrate with the inventive chemical-mechanical polishing composition. This enables the pallets to be locked in place sequentially by rotating the shaft assembly an predetermined angular rotation each time a pallet is loaded. Optical channel control information is inserted into the overhead bytes of the ODU andor OTU.