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Rvfm double concave spherical diameter 50mm fl 1000mm
rvfm double concave spherical diameter 50mm fl 1000mm
Rvfm double concave spherical diameter 50mm fl 1000mm
50mm diameter double concave spherical lenses rvfm ph300789 a double concave spherical lens with a focal length of 1000mm and a power of 1d rvfm double concave spherical diameter 50mm fl 1000mm

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