241725, 260102, 260113, 260121, 261710, 261725, 280105 - Other notational signs and symbols, including pH, hazardous materials symbols, degree sign(�), pound sign(#), equal signs(=), and other mathematical symbols. Plain single line circles. Two circles. Circles that are totally or partially shaded. Zig-zag line(s). Other lines, bands or bars. Inscriptions in Greek characters, including the following: Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ ς Σ σ Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω.