... 40/16,40/16S,40/20,52/26 DingRun High Quality Self-drilling Anchor Bolt R51N1)Business Type: Manufacture and ... , exporters and importers of PRECESION STEEL PIPES & TUBES, based in Jiangyin city, Yangtze River Delta, China. The factory ... brings in advanced manufacturing technique and equipments, implements ISO9001 quality system codes, operates effective management model, confirm to systemic value ...