... Prism, Penta Prism, Beamsplitter Penta Prism, Corner Cube Reflector, Porro Prism, Dove Prism, Rhomboid Prism, Brewster Prism, Equilateral Prism, Roof Prism, Wedge Prism, Anamorphic Prism and Custom Prism ... Import & Export Company, formerly known as China National Machinery Import and Export Corporation ... Machine Tools, Instrument and Apparatus, as well as the import and export business permitted ...