A two-substance spray nozzle includes a mixing chamber in which a target body is provided, against which the liquid stream strikes. The mesh material of the utensil compartments of the utensil tray supports utensils and includes holes sized to allow debris to fall there through into the debris collector tray for collecting the debris. Physical CCA signal to operating center instrumentation interconnections are accomplished via a cross-point matrix. The force and duration of the stirring is predetermined to prevent eye damage. Also disclosed herein are systems, methods and products for integrating interpretive extractions with structured data into unified structures that can be analyzed with, among other tools, data mining and data visualization tools. The apparatus includes a first holding unit configured to hold and rotate the overlapped substrate, and a displacement gauge configured to measure displacements of peripheral sides of a first substrate and a second substrate constituting the overlapped substrate while rotating the overlapped substrate held by the first holding unit.