... shalf for semi-trailers. 2,2'' and3.5''kingpin 3,Assembly and welding We can supply various camshafts for trucks, semi-trailers ... spare parts.3,BPW standard.4,2'' and 3.5'' kingpin5,Assembly and welding 50 and 90 kingpin 1,Huangjing Machine manufacture Co.,LTD ... was found in 2002 and is an ISO9001:2000 and TS14969 ...