1.auto part/auto accessories/automobile part 2. Made by Continuous ... ball diameter 7~8,ball number 400~600/mm2 ---compare sand casting, at same strength, elongation increase 50~100 ... industries,such as railway vehicle, oil machine,engineering machine,auto parts,compressor, hydraulic and pneumatics,chemical pump, machine tool ... stator, gear Mine mechinanismwear resist sleeve, engine cylinder auto part