... Ltd.. a subsidiary of Haihui Group Co.,ltd, locates in Zhaoxian Industry Park , Ju County, Rizhao City , ... reasonable prices and stylish designs, our products are extensively used in cement, electrical power, mine, port, building materials, ... special used for Conveyor roller . The tolerance of shaft insure in -0.01mm to +0.01mm in order ... conveyor roller with frame passed ISO9000 in machinery in china