... the device's body. Electric current through the solenoid determines how much (or less) the plunger constricts air-flow which means ... Research and Development Department, customized design is available, OEM&ODM are welcomed; 2) Professional Factory: As one of the three ... National Oxygen Sensor Industry Standard 2, ( the other two creaters are BOSCH and DELPHI ), We, PUCHENG SENSORS(Shanghai)CO., LTD., ...