Trust Industrial Machinery Company is a professional China D.O.T AIR BRAKE- COPPER TUBING FITTINGS Manufacturers and China D.O.T AIR BRAKE- COPPER TUBING FITTINGS suppliers,our factory which manufacture brass fittings, stainless steel fittings and air brake hose assemblies (AIR BRAKE HOSE ASSEMBLIES). It adopts full CNC machining and has a factory area of 3,600 square meters. 58 automatic machine tools, 35 semi-automatic CNC machines, 5 sets of testing equipment, annual production of various brass fittings,D.O.T AIR BRAKE- COPPER TUBING FITTINGS,stainless steel fittings, air brake hose assembly of 2,500,000 sets / each