second radiation constant
第二辐射常数

• polyethylen
• polyethylene dimethacrylate
• polyfoam
• polyglas
• polygon
• polygonal
• polygonal mirror
• polygonal mirrors
• polygonal prism
• polyhedral
• polyhedron
• polyisobutylene
• poly-lens objectie
• polymer
• polymeric thin film
• polymerization
• polymerization transition
• polymerized
• polymerized diacthylene
• Polymer processing
• Polymer science
• polymethacrylate
• polymethacrylic acid
• polymethine
• polymethine dye laser