... part, Mechanical part, Machine tool, Hardware product, Valve, Pump valve, Electro-mechanical equipment, Plastic product and Name plate ( ... -edited letters, numbers, codes and graphs, meanwhile, to work pieces at a high frequency under the application of compressed air ... Tube, Sleeve, Collar, Roller, Pump Valve, Ring Flange, Valve and Fastener, etc.(3) To mark on Apparatus, Elector-mechanical instrument ...