... Mechinery co.,ltd. is a professional manufacturer of semi-trailer fittings located in Liangshan, Shandong province. We untilize ... well as semi-trailer BPW/American axle assembly,axle tube, the single point suspension ,tandem pendel axle series,spoke axle series,outboard/ ... 6 major varieties of our RSC brand, including axle, BPW/American axle assembly, the single point suspension systems, outboard/ ...