... 16,40/16S,40/20,52/26 DingRun High Quality Self-drilling Anchor Bolt R51N1)Business Type: Manufacture and sale2)The ... exporters and importers of PRECESION STEEL PIPES & TUBES, based in Jiangyin city, Yangtze River Delta, China. The factory locates ... JYDR passed the ISO9001 in 2006. JYDR brings in advanced manufacturing technique and equipments, implements ISO9001 quality system codes, operates ...