Manure Spreaders - A Very Useful Piece of Agricultural Equipment Manure Spreaders - A Very Useful Piece of Agricultural Equipment lisungroup.com Home About Us Products Goniophotometer LSG-6000 LM-79 Moving Detector Goniophotometer LSG-2000 Goniophotometer with Rotating Mirror LSG-1950 Goniophotometer for Automotive and Signal Lamps LSG-1950S G